Thirty-one county teams from the island of Ireland, plus London, compete; Kilkenny do not participate.
The 2022 National Football League consists of four divisions of eight teams.
Teams compete for promotion and relegation to a higher or lower league.
As per the Official GAA Guide - Part 1 - Section 6.21[4] - If two teams in the same group are equal on points on completion of the league phase, the following tie-breaking criteria are applied: If three or more teams in the same group are equal on points on completion of the league phase, the following tie-breaking criteria are applied: In the event that two teams or more finish with equal points, but have been affected by a disqualification, loss of game on a proven objection, retirement or walkover, the tie shall be decided by the following means:
London returned for the first time since March 2020, due to the impact of the COVID-19 pandemic on Gaelic games.