The Ólbescból League A Championship, commonly known just as the A Championship, is the top-tier ólbescból league in Craitland and is contested by teams representing counties. The league involves 16 teams, each playing 60 games, totalling 480 games, a season. The season begins in March and ends in October, with games being played on Mondays and Fridays.
The A Championship was founded in early 2008, when professional ólbescból teams were permitted after the expansion of the original All-Craitland Championship. Since 2008, the league has been played with no change in format, with four teams being relegated to the B Championship after each season and four being promoted.