Wojciech Horacy Kossak (31 December 1856 – 29 July 1942) was a Polish painter and member of the celebrated Kossak family of artists and writers. He was the son of painter Juliusz Kossak, and twin brother of freedom fighter Tadeusz Kossak. He was also the father of two highly talented literary daughters, Maria Pawlikowska-Jasnorzewska and Magdalena Samozwaniec and of a painter son, Jerzy Kossak.