 Five teams were relegated from 2018 Division 1 to the new Division 1B (see below for details).The 2019 senior championship was competed for by the top 15 teams in the 2018 Division 1 and Banagher, the winners of the 2018 Division 2 and winners of a relegation/promotion playoff against Newbridge.Claudy, who finished 16th in 2018, were relegated to the 2019 intermediate football championship.