The 2019 Connacht Senior Football Championship was the 120th installment of the annual Connacht Senior Football Championship organised by Connacht GAA. It was one of the four provincial competitions of the 2019 All-Ireland Senior Football Championship. As of 2018, the competition winners advanced to the "All-Ireland Super 8s".
The draw for the 2019 Connacht Championship was made on 12 October 2018.
The winners receive the J. J. Nestor Cup, named after J. J. Nestor of Quinaltagh, County Galway. For a fourth year in a row, the final was contested between Galway and Roscommon. Roscommon were the winners of the championship, defeating Galway at Pearse Stadium in Salthill by 1-13 to 0-12.
The Connacht championship is contested by the five counties in the Irish province of Connacht plus London and New York.
The Connacht county teams play London and New York on a rotational basis. The match involving New York was a quarter-final in 2019 â it was last a preliminary game in 2017.