Can you keep your Czech Republic citizenship when you become a U.S. citizen?
Allowed
Yes, in general
Since 1 January 2014, Czech law allows multiple citizenship, so a Czech citizen who becomes a U.S. citizen can keep their Czech citizenship.
What the law says
- Since 1 January 2014, multiple citizenship under Czech law is allowed.
- Czech citizenship can be renounced voluntarily only if doing so wouldn't cause statelessness (unless in connection with marriage or birth).
- The involuntary loss of citizenship is constitutionally prohibited.
- Before the 2013 Citizenship Act (effective 1 January 2014), restrictions on dual citizenship existed and were sometimes argued to be a form of involuntary deprivation of citizenship.
“Since 1 January 2014, multiple citizenship under Czech law is allowed.”
What about the U.S. side?
The United States allows dual citizenship. At the oath ceremony you promise to renounce allegiance to other countries, but U.S. law does not make you formally give up your other passport. The question is only whether Czech Republic lets you keep yours.
Source: Czech nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Czech Republic embassy or consulate before your oath ceremony. This is not legal advice.
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