Czaja is a surname. Notable people with the surname include:
Andrzej Czaja (born 1963), Polish Roman Catholic bishop Dominik Czaja (born 1995), Polish rower Emile Czaja (1909–1970), Australian-Indian wrestler Herbert Czaja (1914–1997), German politician Jakub Czaja (born 1980), Polish athlete Mario Czaja (born 1975), German politician Mary Czaja (born 1963), American businesswoman and politician Wiesław Czaja (born 1952), Polish volleyball player and coach Zbigniew Czaja (born 1958), Polish slalom canoeist Aleksandra Kosiorek (née Czaja; born 1985), Polish politician and jurist
See also
Czajka (disambiguation)