1990 IAR Season

1990 was the second season of Irish Amateur Rugby. The twelve teams were split into two divisions. The top team in each division advanced to the IAR Championship Series. The Killarney Penguins won the Championship.

Fixtures
Each team played the five teams within their division and three teams from the opposite division for a total of eight games.

Championship Series
The top team in each division play a two game series to decide the champion. Higher seeded team picks if they get their home game first or last.