The 2019 Down Senior Football Championship was the 111th official edition of Down GAA's premier Gaelic Football tournament for senior clubs in County Down. 16 teams competed with the winner representing Down in the Ulster Senior Club Football Championship. The tournament operated a double elimination format for the opening two rounds of the championship, with the winners and early round losers rejoining at the quarter final stage. Bredagh made their return to the senior grade after claiming the Down I.F.C. title in 2018.