Domińczyk/ Dominczyk/ Dominchyk/ Dominchuk is a Polish surname. Notable people with the name include:
Dagmara Domińczyk (born 1976), Polish-born American actress John Dominczyk, character from 2014 crime drama film A Most Violent Year Marika Domińczyk (born 1980), Polish-born American actress (1953–2023), Polish Solidarity activist Veronika Domińczyk (born 1986), Polish-American actress and sister of Dagmara Domińczyk