Poland is a country in Central Europe bordered by Belarus, Czech Republic, Germany, Lithuania, Russia, Slovakia, and Ukraine. The geography of Poland is flat with mountains along the southern border. The government system is a republic. The chief of state is the President and the head of government is the Prime Minister. Poland has a mixed economic system in which the economy includes a variety of private freedom, combined with centralized economic planning and government regulation. Poland is a member of the European Union (EU).