Janusz Kazimierz Gortat (born November 5, 1948) is a retired boxer from Poland, who represented his native country at two consecutive Summer Olympics, starting in 1972.
In both tournaments he won the bronze medal in the light heavyweight division (– 75 kg) after being defeated in the semifinals by eventual winners (Leon Spinks of the United States in 1976 and Mate Parlov of Yugoslavia in 1972).
Born in Brzozów, he is the father of basketball player Marcin Gortat of the Los Angeles Clippers and boxer Robert Gortat.