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FIELD LISTING :: CITIZENSHIP
This entry gives the lengths and types of pipelines for transporting products like natural gas, crude oil, or petroleum products.

Country Comparison to the World

Country | PIPELINES
--- | ---
Afghanistan | citizenship by birth: no citizenship by descent only: at least one parent must have been born in - and continuously lived in - Afghanistan dual citizenship recognized: no residency requirement for naturalization: 5 years
Albania | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Albania dual citizenship recognized: yes residency requirement for naturalization: 5 years
Algeria | citizenship by birth: no citizenship by descent only: the mother must be a citizen of Algeria dual citizenship recognized: no residency requirement for naturalization: 7 years
American Samoa | see United States
Andorra | citizenship by birth: no citizenship by descent only: the mother must be an Andorran citizen or the father must have been born in Andorra and both parents maintain permanent residence in Andorra dual citizenship recognized: no residency requirement for naturalization: 25 years
Angola | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Angola dual citizenship recognized: no residency requirement for naturalization: 10 years
Anguilla | see United Kingdom
Antigua and Barbuda | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 7 years
Argentina | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 2 years
Armenia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Armenia dual citizenship recognized: yes residency requirement for naturalization: 3 years
Aruba | see the Netherlands
Ashmore and Cartier Islands | see Australia
Australia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen or permanent resident of Australia dual citizenship recognized: yes residency requirement for naturalization: 4 years
Austria | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Austria dual citizenship recognized: no residency requirement for naturalization: 10 years
Azerbaijan | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Bahamas, The | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of The Bahamas dual citizenship recognized: no residency requirement for naturalization: 6-9 years
Bahrain | citizenship by birth: no citizenship by descent only: the father must be a citizen of Bahrain dual citizenship recognized: no residency requirement for naturalization: 25 years; 15 years for Arab nationals
Bangladesh | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Bangladesh dual citizenship recognized: yes, but limited to select countries residency requirement for naturalization: 5 years
Barbados | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years
Belarus | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Belarus dual citizenship recognized: no residency requirement for naturalization: 7 years
Belgium | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Belguim dual citizenship recognized: yes residency requirement for naturalization: 5 years
Belize | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years
Benin | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Benin dual citizenship recognized: yes residency requirement for naturalization: 10 years
Bermuda | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the UK dual citizenship recognized: yes residency requirement for naturalization: 10 years
Bhutan | citizenship by birth: no citizenship by descent only: the father must be a citizen of Bhutan dual citizenship recognized: no residency requirement for naturalization: 10 years
Bolivia | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 3 years
Bosnia and Herzegovina | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Bosnia and Herzegovina dual citizenship recognized: yes, provided there is a bilateral agreement with the other state residency requirement for naturalization: 8 years
Botswana | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Botswana dual citizenship recognized: no residency requirement for naturalization: 10 years
Brazil | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 4 years
British Virgin Islands | see United Kingdom
Brunei | citizenship by birth: no citizenship by descent only: the father must be a citizen of Brunei dual citizenship recognized: no residency requirement for naturalization: 12 years
Bulgaria | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Bulgaria dual citizenship recognized: yes residency requirement for naturalization: 5 years
Burkina Faso | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Burkina Faso dual citizenship recognized: yes residency requirement for naturalization: 10 years
Burma | citizenship by birth: no citizenship by descent only: both parents must be citizens of Burma dual citizenship recognized: no residency requirement for naturalization: none note: an applicant for naturalization must be the child or spouse of a citizen
Burundi | citizenship by birth: no citizenship by descent only: the father must be a citizen of Burundi dual citizenship recognized: no residency requirement for naturalization: 10 years
Cabo Verde | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Cabo Verde dual citizenship recognized: yes residency requirement for naturalization: 5 years
Cambodia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Cambodia dual citizenship recognized: yes residency requirement for naturalization: 7 years
Cameroon | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Cameroon dual citizenship recognized: no residency requirement for naturalization: 5 years
Canada | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 3 years
Cayman Islands | see United Kingdom
Central African Republic | citizenship by birth: no citizenship by descent only: least one parent must be a citizen of the Central African Republic dual citizenship recognized: yes residency requirement for naturalization: 35 years
Chad | citizenship by birth: no citizenship by descent only: both parents must be citizens of Chad dual citizenship recognized: Chadian law does not address dual citizenship residency requirement for naturalization: 15 years
Chile | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years
China | citizenship by birth: no citizenship by descent only: least one parent must be a citizen of China dual citizenship recognized: no residency requirement for naturalization: while naturalization is theoretically possible, in practical terms it is extremely difficult; residency is required but not specified
Christmas Island | see Australia
Cocos (Keeling) Islands | see Australia
Colombia | citizenship by birth: no citizenship by descent only: least one parent must be a citizen or permanent resident of Colombia dual citizenship recognized: yes residency requirement for naturalization: 5 years
Comoros | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Comoros dual citizenship recognized: no residency requirement for naturalization: 10 years
Congo, Democratic Republic of the | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Democratic Republic of the Congo dual citizenship recognized: no residency requirement for naturalization: 5 years
Congo, Republic of the | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Republic of the Congo dual citizenship recognized: no residency requirement for naturalization: 10 years
Coral Sea Islands | see Australia
Costa Rica | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 7 years
Cote d'Ivoire | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Cote d'Ivoire dual citizenship recognized: no residency requirement for naturalization: 5 years
Croatia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Croatia dual citizenship recognized: yes residency requirement for naturalization: 5 years
Cuba | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: unknown
Curacao | see the Netherlands
Cyprus | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Cyprus dual citizenship recognized: yes residency requirement for naturalization: 7 years
Czech Republic | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Czech Republic dual citizenship recognized: no residency requirement for naturalization: 5 years
Denmark | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Denmark dual citizenship recognized: no residency requirement for naturalization: 7 years
Djibouti | citizenship by birth: no citizenship by descent only: the mother must be a citizen of Djibouti dual citizenship recognized: no residency requirement for naturalization: 10 years
Dominica | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years
Dominican Republic | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Dominican Republic dual citizenship recognized: yes residency requirement for naturalization: 2 years
Ecuador | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 3 years
Egypt | citizenship by birth: no citizenship by descent only: if the father was born in Egypt dual citizenship recognized: only with prior permission from the government residency requirement for naturalization: 10 years
El Salvador | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years
Equatorial Guinea | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Equatorial Guinea dual citizenship recognized: no residency requirement for naturalization: 10 years
Eritrea | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Eritrea dual citizenship recognized: no residency requirement for naturalization: 20 years
Estonia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Estonia dual citizenship recognized: no residency requirement for naturalization: 5 years
Ethiopia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Ethiopia dual citizenship recognized: no residency requirement for naturalization: 4 years
Falkland Islands (Islas Malvinas) | see United Kingdom
Faroe Islands | see Denmark
Fiji | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Fiji dual citizenship recognized: yes residency requirement for naturalization: 5 years
Finland | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Finland dual citizenship recognized: yes residency requirement for naturalization: 6 years
France | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of France dual citizenship recognized: yes residency requirement for naturalization: 5 years
French Polynesia | see France
French Southern and Antarctic Lands | see France
Gabon | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Gabon dual citizenship recognized: no residency requirement for naturalization: 10 years
Gambia, The | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Georgia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Georgia dual citizenship recognized: no residency requirement for naturalization: 10 years
Germany | citizenship by birth: no citizenship by descent only: at least one parent must be a German citizen or a resident alien who has lived in Germany at least 8 years dual citizenship recognized: yes, but requires prior permission from government residency requirement for naturalization: 8 years
Ghana | citizenship by birth: no citizenship by descent only: at least one parent or grandparent must be a citizen of Ghana dual citizenship recognized: yes residency requirement for naturalization: 5 years
Gibraltar | see United Kingdom
Greece | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Greece dual citizenship recognized: yes residency requirement for naturalization: 10 years
Greenland | see Denmark
Grenada | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 7 years for persons from a non-Caribbean state and 4 years for a person from a Caribbean state
Guam | see United States
Guatemala | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 years with no absences of six consecutive months or longer or absences totaling more than a year
Guernsey | see United Kingdom
Guinea-Bissau | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Guinea | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Guinea dual citizenship recognized: no residency requirement for naturalization: na
Guyana | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: na
Haiti | citizenship by birth: no citizenship by descent only: at least one parent must be a native-born citizen of Haiti dual citizenship recognized: no residency requirement for naturalization: 5 years
Holy See (Vatican City) | citizenship by birth: no citizenship by descent: no dual citizenship recognized: no residency requirement for naturalization: not applicable note: in the Holy See, citizenship is acquired by law, ex iure, or by adminstrative decision; in the first instance citizenship is a function of holding office within the Holy See as in the case of cardinals resident in Vatican City or diplomats of the Holy See; in the second instance, citizenship may be requested in a limited set of circumstances for those who reside within Vatican City under papal authorization, as a function of their office or service, or as the spouses and children of current citizens; citizenship is lost once an individual no longer permanently resides in Vatican City, normally reverting to the citizenship previously held
Honduras | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 1 to 3 years
Hong Kong | see China
Hungary | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Hungary dual citizenship recognized: yes residency requirement for naturalization: 8 years
Iceland | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Iceland dual citizenship recognized: yes residency requirement for naturalization: 3 to 7 years
India | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of India dual citizenship recognized: no residency requirement for naturalization: 5 years
Indonesia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Indonesia dual citizenship recognized: no residency requirement for naturalization: 5 continuous years
Iran | citizenship by birth: no citizenship by descent only: the father must be a citizen of Iran dual citizenship recognized: no residency requirement for naturalization: 5 years
Iraq | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Iraq dual citizenship recognized: yes residency requirement for naturalization: 10 years
Ireland | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 4 of the previous 8 years
Isle of Man | see United Kingdom
Israel | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Israel dual citizenship recognized: yes, but naturalized citizens are not allowed to maintain dual citizenship residency requirement for naturalization: 3 years
Italy | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Italy dual citizenship recognized: yes residency requirement for naturalization: 4 years for EU nationals, 5 years for refugees and specified exceptions, 10 years for all others
Jamaica | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 4 out of the previous 5 years
Japan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Japan dual citizenship recognized: no residency requirement for naturalization: 5 years
Jersey | see United Kingdom
Jordan | citizenship by birth: no citizenship by descent only: the father must be a citizen of Jordan dual citizenship recognized: yes residency requirement for naturalization: 15 years
Kazakhstan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Kazakhstan dual citizenship recognized: no residency requirement for naturalization: 5 years
Kenya | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Kenya dual citizenship recognized: no residency requirement for naturalization: 4 out of the previous 7 years
Kiribati | citizenship by birth: no citizenship by descent only: at least one parent must be a native-born citizen of Kiribati dual citizenship recognized: no residency requirement for naturalization: 7 years
Korea, North | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of North Korea dual citizenship recognized: no residency requirement for naturalization: unknown
Korea, South | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of South Korea dual citizenship recognized: no residency requirement for naturalization: 5 years
Kosovo | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Kosovo dual citizenship recognized: yes residency requirement for naturalization: 5 years
Kuwait | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Kuwait dual citizenship recognized: no residency requirement for naturalization: not specified
Kyrgyzstan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Kyrgyzstan dual citizenship recognized: yes, but only if a mutual treaty on dual citizenship is in force residency requirement for naturalization: 5 years
Laos | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Laos dual citizenship recognized: no residency requirement for naturalization: 10 years
Latvia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Latvia dual citizenship recognized: no residency requirement for naturalization: 5 years
Lebanon | citizenship by birth: no citizenship by descent only: the father must be a citizen of Lebanon dual citizenship recognized: yes residency requirement for naturalization: unknown
Lesotho | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Liberia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Liberia dual citizenship recognized: no residency requirement for naturalization: 2 years
Libya | citizenship by birth: no citizenship by descent only: at least one parent or grandparent must be a citizen of Libya dual citizenship recognized: no residency requirement for naturalization: varies from 3 to 5 years
Liechtenstein | citizenship by birth: no citizenship by descent only: the father must be a citizen of Liechtenstein; in the case of a child born out of wedlock, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: 5 years
Lithuania | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Lithuania dual citizenship recognized: no residency requirement for naturalization: 10 years
Luxembourg | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Luxembourg dual citizenship recognized: no residency requirement for naturalization: 10 years
Macau | see China
Macedonia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Macedonia dual citizenship recognized: no residency requirement for naturalization: 8 years
Madagascar | citizenship by birth: no citizenship by descent only: the father must be a citizen of Madagascar; in the case of a child born out of wedlock, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: unknown
Malawi | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Malawi dual citizenship recognized: no residency requirement for naturalization: 7 years
Malaysia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Malaysia dual citizenship recognized: no residency requirement for naturalization: 10 out 12 years preceding application
Maldives | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Maldives dual citizenship recognized: yes residency requirement for naturalization: unknown
Mali | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Mali dual citizenship recognized: yes residency requirement for naturalization: 5 years
Malta | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Malta dual citizenship recognized: no residency requirement for naturalization: 5 years
Marshall Islands | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Marshall Islands dual citizenship recognized: no residency requirement for naturalization: 5 years
Mauritania | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Mauritania dual citizenship recognized: no residency requirement for naturalization: 5 years
Mauritius | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 5 out of the previous 7 years including the last 12 months
Mexico | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: not specified residency requirement for naturalization: 5 years
Micronesia, Federated States of | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of FSM dual citizenship recognized: no residency requirement for naturalization: 5 years
Midway Islands | see United States
Moldova | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Moldova dual citizenship recognized: no residency requirement for naturalization: 10 years
Monaco | citizenship by birth: no citizenship by descent only: the father must be a citizen of Monaco; in the case of a child born out of wedlock, the mother must be a citizen and father unknown dual citizenship recognized: no residency requirement for naturalization: 10 years
Mongolia | citizenship by birth: no citizenship by descent only: both parents must be citizens of Mongolia; one parent if born within Mongolia dual citizenship recognized: no residency requirement for naturalization: 5 years
Montenegro | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Montenegro dual citizenship recognized: no residency requirement for naturalization: 10 years
Montserrat | see United Kingdom
Morocco | citizenship by birth: no citizenship by descent only: the father must be a citizen of Morocco; if the father is unknown or stateless, the mother must be a citizen dual citizenship recognized: yes residency requirement for naturalization: 5 years
Mozambique | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Mozambique dual citizenship recognized: no residency requirement for naturalization: 5 years
Namibia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Namibia dual citizenship recognized: no residency requirement for naturalization: 5 years
Nepal | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 15 years
Netherlands | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Netherlands dual citizenship recognized: no residency requirement for naturalization: 5 years
New Caledonia | see France
New Zealand | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of New Zealand dual citizenship recognized: yes residency requirement for naturalization: 3 years
Nicaragua | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no, except in cases where bilateral agreements exist residency requirement for naturalization: 4 years
Nigeria | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Nigeria dual citizenship recognized: yes residency requirement for naturalization: 15 years
Niger | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Niger dual citizenship recognized: yes residency requirement for naturalization: unknown
Norfolk Island | see Australia
Northern Mariana Islands | see United States
Norway | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Norway dual citizenship recognized: no residency requirement for naturalization: 7 years
Oman | citizenship by birth: no citizenship by descent only: the father must be a citizen of Oman dual citizenship recognized: no residency requirement for naturalization: unknown
Pakistan | citizenship by birth: yes citizenship by descent: at least one parent must be a citizen of Pakistan dual citizenship recognized: yes, but limited to select countries residency requirement for naturalization: 4 out of the previous 7 years and including the 12 months preceding application
Palau | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Palau dual citizenship recognized: no residency requirement for naturalization: note - no procedure for naturalization
Panama | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Papua New Guinea | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Papua New Guinea dual citizenship recognized: no residency requirement for naturalization: 8 years
Paraguay | citizenship by birth: yes citizenship by descent: at least one parent must be a native-born citizen of Paraguay dual citizenship recognized: yes residency requirement for naturalization: 3 years
Peru | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 2 years
Philippines | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Philippines dual citizenship recognized: no residency requirement for naturalization: 10 years
Pitcairn Islands | see United Kingdom
Poland | citizenship by birth: no citizenship by descent only: both parents must be citizens of Poland dual citizenship recognized: no residency requirement for naturalization: 5 years
Portugal | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Portugal dual citizenship recognized: yes residency requirement for naturalization: 10 years; 6 years if from a Portuguese speaking country
Puerto Rico | see United States
Qatar | citizenship by birth: no citizenship by descent only: the father must be a citizen of Qatar dual citizenship recognized: no residency requirement for naturalization: 20 years; 15 years if an Arab national
Romania | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Romania dual citizenship recognized: yes residency requirement for naturalization: 5 years
Russia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Russia dual citizenship recognized: yes residency requirement for naturalization: 3-5 years
Rwanda | citizenship by birth: no citizenship by descent only: the father must be a citizen of Rwanda; if the father is stateless or unknown, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: 10 years
Saint Barthelemy | see France
Saint Helena, Ascension, and Tristan da Cunha | see United Kingdom
Saint Kitts and Nevis | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 14 years
Saint Lucia | citizenship by birth: yes citizenship by descent: at least one parent must be a citizen of Saint Lucia dual citizenship recognized: yes residency requirement for naturalization: 8 years
Saint Martin | see France
Saint Pierre and Miquelon | see France
Saint Vincent and the Grenadines | citizenship by birth: yes citizenship by descent: at least one parent must be a citizen of Saint Vincent and the Grenadines dual citizenship recognized: yes residency requirement for naturalization: 7 years
Samoa | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Samoa dual citizenship recognized: no residency requirement for naturalization: 5 years
San Marino | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of San Marino dual citizenship recognized: no residency requirement for naturalization: 30 years
Sao Tome and Principe | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Sao Tome and Principe dual citizenship recognized: no residency requirement for naturalization: 5 years
Saudi Arabia | citizenship by birth: no citizenship by descent only: the father must be a citizen of Saudi Arabia; a child born out of wedlock in Saudi Arabia to a Saudi mother and unknown father dual citizenship recognized: no residency requirement for naturalization: 5 years
Senegal | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Senegal dual citizenship recognized: no, but Senegalese citizens do not automatically lose their citizenship if they acquire citizenship in another state residency requirement for naturalization: 5 years
Serbia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Serbia dual citizenship recognized: yes residency requirement for naturalization: 3 years
Seychelles | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Seychelles dual citizenship recognized: no residency requirement for naturalization: 5 years
Sierra Leone | citizenship by birth: no citizenship by descent only: at least one parent or grandparent must be a citizen of Sierra Leone dual citizenship recognized: yes residency requirement for naturalization: 5 years
Singapore | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Singapore dual citizenship recognized: no residency requirement for naturalization: 10 years
Sint Maarten | see the Netherlands
Slovakia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Slovakia dual citizenship recognized: no residency requirement for naturalization: 5 years
Slovenia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Slovenia; both parents if the child is born outside of Slovenia dual citizenship recognized: yes, for select cases residency requirement for naturalization: 10 years, the last 5 of which have been continuous
Solomon Islands | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the Solomon Islands dual citizenship recognized: no residency requirement for naturalization: 7 years
Somalia | citizenship by birth: no citizenship by descent only: the father must be a citizen of Somalia dual citizenship recognized: no residency requirement for naturalization: 7 years
South Africa | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of South Africa dual citizenship recognized: yes, but requires prior permission of the government residency requirement for naturalization: 1 year
South Sudan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of South Sudan dual citizenship recognized: yes residency requirement for naturalization: 10 years
Spain | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Spain dual citizenship recognized: only with select Latin American countries residency requirement for naturalization: 10 years for persons with no ties to Spain
Sri Lanka | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Sri Lanka dual citizenship recognized: no, except in cases where the government rules it is to the benefit of Sri Lanka residency requirement for naturalization: 7 years
Sudan | citizenship by birth: no citizenship by descent only: the father must be a citizen of Sudan dual citizenship recognized: no residency requirement for naturalization: 10 years
Suriname | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Suriname dual citizenship recognized: no residency requirement for naturalization: 5 years
Svalbard | see Norway
Swaziland | citizenship by birth: no citizenship by descent only: both parents must be citizens of Swaziland dual citizenship recognized: no residency requirement for naturalization: 5 years
Sweden | citizenship by birth: no citizenship by descent only: the father must be a citizen of Sweden; in the case of a child born out of wedlock, the mother must be a citizen of Sweden and the father unknown dual citizenship recognized: no, unless the other citizenship was acquired involuntarily residency requirement for naturalization: 5 years
Switzerland | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Switzerland dual citizenship recognized: yes residency requirement for naturalization: 12 years including at least 3 of the last 5 years prior to application
Syria | citizenship by birth: no citizenship by descent only: the father must be a citizen of Syria; if the father is unknown or stateless, the mother must be a citizen of Syria dual citizenship recognized: yes residency requirement for naturalization: 10 years
Taiwan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Taiwan dual citizenship recognized: no residency requirement for naturalization: 5 years
Tajikistan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Tajikistan dual citizenship recognized: no residency requirement for naturalization: 5 years or 3 years of continuous residence prior to application
Tanzania | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Tanzania; if a child is born abroad, the father must be a citizen of Tanzania dual citizenship recognized: no residency requirement for naturalization: 5 years
Thailand | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Thailand dual citizenship recognized: no residency requirement for naturalization: 5 years
Timor-Leste | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Timor-Leste dual citizenship recognized: no residency requirement for naturalization: 10 years
Togo | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Togo dual citizenship recognized: yes residency requirement for naturalization: 5 years
Tokelau | see New Zealand
Tonga | citizenship by birth: no citizenship by descent only: the father must be a citizen of Tonga; if a child is born out of wedlock, the mother must be a citizen of Tonga dual citizenship recognized: yes residency requirement for naturalization: 5 years
Trinidad and Tobago | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 8 years
Tunisia | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Tunisia dual citizenship recognized: yes residency requirement for naturalization: 5 years
Turkey | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Turkey dual citizenship recognized: yes, but requires prior permission from the government residency requirement for naturalization: 5 years
Turkmenistan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Turkmenistan dual citizenship recognized: yes residency requirement for naturalization: 7 years
Turks and Caicos Islands | see United Kingdom
Tuvalu | citizenship by birth: yes citizenship by descent: yes; for a child born abroad, at least one parent must be a citizen of Tuvalu dual citizenship recognized: yes residency requirement for naturalization: na
Uganda | citizenship by birth: no citizenship by descent only: at least one parent or grandparent must be a native-born citizen of Uganda dual citizenship recognized: yes residency requirement for naturalization: an aggregate of 20 years and continuously for the last 2 years prior to applying for citizenship
Ukraine | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Ukraine dual citizenship recognized: no residency requirement for naturalization: 5 years
United Arab Emirates | citizenship by birth: no citizenship by descent only: the father must be a citizen of the United Arab Emirates; if the father is unknown, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: 30 years
United Kingdom | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of the United Kingdom dual citizenship recognized: yes residency requirement for naturalization: 5 years
United States | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no, but the US government acknowledges such situtations exist; US citizens are not encouraged to seek dual citizenship since it limits protection by the US residency requirement for naturalization: 5 years
Uruguay | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: yes residency requirement for naturalization: 3-5 years
Uzbekistan | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Uzbekistan dual citizenship recognized: no residency requirement for naturalization: 5 years
Vanuatu | citizenship by birth: no citizenship by descent only: both parents must be citizens of Vanuatu; in the case of only one parent, it must be the father who is a citizen dual citizenship recognized: no residency requirement for naturalization: 10 years
Venezuela | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: 5 years
Vietnam | citizenship by birth: no citizenship by descent only: at least one parent must be a citizen of Vietnam dual citizenship recognized: no residency requirement for naturalization: 5 years
Virgin Islands | see United States
Wake Island | see United States
Wallis and Futuna | see France
Yemen | citizenship by birth: no citizenship by descent only: the father must be a citizen of Yemen; if the father is unknown, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: 10 years
Zambia | citizenship by birth: yes citizenship by descent: yes dual citizenship recognized: no residency requirement for naturalization: not specified
Zimbabwe | citizenship by birth: no citizenship by descent only: the father must be a citizen of Zimbabwe; in the case of a child born out of wedlock, the mother must be a citizen dual citizenship recognized: no residency requirement for naturalization: 5 years

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