Jerzy Kossak (Kraków, 11 September 1886 – 11 May 1955, Kraków) was a Polish realist painter specializing in military scenes; son of painter Wojciech Kossak and grandson of painter Juliusz Kossak — a third-generation artist from a well-known and sought after family of painters, writers and poets.

Jerzy Kossak was a prolific painter of mostly historic scenes featuring the famed Polish Uhlans on horses, usually sold on the spot, but also used for barter at times of the postwar economic slump, until his death before the end of Stalinism in Poland. His paintings, along with those of his antecessors remain best-selling at Polish art auctions.

Jerzy Kossak was a brother: to poet Maria Pawlikowska-Jasnorzewska and novelist Magdalena Samozwaniec, as well as the father of: biologist Simona Kossak and painter Gloria Kossak residing at the historic family manor called "Kossakówka", in metropolitan Kraków.