<P> Former South Korean nationals can reacquire South Korean nationality by applying for reacquisition of nationality . However, this will reinstate the military service duty, if applicable to the national, and also requires forfeiting any foreign nationality within 6 months . </P> <P> Visa requirements for South Korean citizens are administrative entry restrictions by the authorities of other states placed on citizens of Republic of Korea . In 2014, South Korean citizens have visa - free or visa on arrival access to 172 countries and territories, ranking the South Korean passport 3rd in the world according to the Visa Restrictions Index . </P> <P> In 2010, the South Korean government legalized dual citizenship for some South Koreans who have acquired another nationality / citizenship, as well as foreigners who lived in South Korea for five years (two years if married to a South Korean). </P> <P> A revised nationality law passed on 21 April 2010, by the National Assembly of South Korea and in effect since 1 January 2011, granted a limited number of persons dual citizenship . </P>

Can you have dual citizenship in us and korea