They replaced St. Patrick's Palmerstown and Round Towers Clondalkin who were relegated to the 2020 I.F.C.
[2] Round Towers Lusk won the Senior 2 Championship and were promoted along with finalists Whitehall Colmcille to Senior 1.
[3] The team named first in Rounds 1 and 2 in each group will have home advantage.
Round 3 will see teams play at neutral venues.
Round 3 will see teams play at neutral venues.