This list is based on the best current information available.  Some countries do not allow dual citizenship at all. Others have various restrictions regarding losing or acquiring dual citizenship and for that reason are not listed in the following.  If you are concerned about losing your present citizenship when you naturalize as a U.S. citizen, speak to a representative of your government before filing for naturalization.

Dual Citizenship Generally Allowed After U.S. Naturalization

Albania
Antigua
Australia
Barbados
Belgium
Belize
Benin
Bulgaria
Burkina Faso
Cambodia
Canada
Cape Verde
Central African Republic
Colombia
Costa Rica
Côte d´Ivoire
Croatia
Cyprus
Dominica
Dominican Republic
Ecuador
El Salvador
France
Ghana
Greece
Grenada
Guatemala
Hong Kong
Hungary
Iran
Ireland
Israel
Jamaica
Latvia
Lesotho
Liechtenstein
Macao
Maldives
Mexico
Morocco
Namibia
Nevis
New Zealand
Nigeria
Panama
Peru
Poland
Portugal
Romania
St. Christopher
St. Kitts
St. Lucia
Slovenia
Sri Lanka
Switzerland
Syria<
Taiwan
Togo
Tunisia
Turkey
Tuvalu
United Kingdom

Dual Citizenship Generally Not Allowed After U.S. Naturalization

Algeria
Andorra
Azerbaijan
Bahrain
Belarus
Bhutan
Bolivia
Botswana
Brunei
Burundi
Cameroon
Chile
China
Congo
Cuba
Djibouti
Equatorial Guinea
Gabon
Guinea
Honduras
Indonesia
Iraq
Japan
Kazakhstan
Kiribati
Kuwait
Kyrgyzstan
Laos
Libya
Malawi
Malaysia
Mali
Monaco
Mongolia
Myanmar (Burma)
Nepal
New Guinea
Nicaragua
Niger
North Korea
Norway
Oman
Pakistan
Palau
Papua
Príncipe Island
Qatar
Rwanda
Saudi Arabia
Sierra Leone
Singapore
South Korea
Sudan
Swaziland
Sweden
Tonga
Uganda
Ukraine
United Arab Emirates
Uzbekistan
Venezuela
Vietnam
Yemen
Zimbabwe