Mayo Football League have announced an increase of 26% in junior teams this season.
This brings the total from 34 up to 43 for 2021 and there are also 14 new teams taking part in their inaugural Under 21 League.
To cope with this change a fifth division, which will be sponsored by CMR Fire & Security, has been added.
Ballinrobe Town are back in the league after an absence of five years, there are 'B' teams from Ballyheane, Ballyglass, Fahy Rovers, Moy Villa and Swinford, and 'C' teams from Conn Rangers, Claremorris and Manulla.
The League season will commence with the opening round of the Under 21 League on the weekend of the 12th/13th June, while the junior teams will kick-off on the weekend of the 26th/27 th June with the First Round of the Calor Gas Super and Premier Cups.