Dual Citizenship

Dual nationality is permissible under U.S. law. Further information is provided through the Department of State’s website at http://travel.state.gov .

For detailed information visit: http://travel.state.gov/content/travel/english/legal-considerations/us-citizenship-laws-policies/citizenship-and-dual-nationality/dual-nationality.html

By law, U.S. citizens, including dual nationals, must use a U.S. passport to enter and exit the United States. U.S. citizens are not eligible for a U.S. visa. U.S./Canada dual citizens are advised to carry both valid passports (U.S. and Canada) when traveling to/from the United States. The dual citizen will be required to present their U.S. passport at U.S. immigration and might be requested to present their Canadian passport when going through Canadian immigration.
By law U.S. citizens must enter and depart the United States using U.S. passports, even if they hold a passport from another country.
By law, U.S. citizens, including dual nationals, must use a U.S. passport to enter and exit the United States. U.S. citizens are not eligible for a U.S. visa. U.S./Canada dual citizens are advised to carry both valid passports (U.S. and Canada) when traveling to/from the United States. The dual citizen will be required to present their U.S. passport at U.S. immigration and might be requested to present their Canadian passport when going through Canadian immigration.
For information on U.S. policy regarding dual nationality, please read the website section on Dual Nationality at https://travel.state.gov . U.S. law does not contain any provisions requiring U.S. Citizens who are born with dual nationality to choose one nationality or the other when they become adults.