Polish law does not explicitly allow dual citizenship, but possession of another citizenship is tolerated since there are no penalties for its possession alone.

Does Poland allow dual citizenship with the US?

DUAL CITIZENSHIP: NOT RECOGNIZED. Poland does not recognize dual citizenship of its citizens. Polish law does not forbid a Polish citizen from becoming the citizen of a foreign state but Polish authorities will only recognize the Polish citizenship.

Does Poland give citizenship to foreigners?

Poland offers temporary residence to business investors that want to start a business in the country. ... After 3 years of permanent residence, the foreigner can apply for naturalization into Polish citizenship. Citizenship by investment is also possible at the discretion of the government.