Kornacki (Polish pronunciation: ; feminine: Kornacka; plural: Kornaccy) is a surname. Notable people with the surname include:
Ryszard Kornacki (born 1940), Polish poet and writer Steve Kornacki (born 1979), American journalist, writer and television host Helena Boguszewska (Helena Boguszewska-Kornacka) (1886–1978), Polish writer
See also