Athletics Ireland have released the club membership stats as of the end of September 2018. The chart below shows the top clubs according to Adult membership numbers across Ireland. (I’ve shown adult only membership as some clubs are adult only, and some are juvenile only). Galway City Harriers are comfortably topping the table in terms of size of the adult clubs, followed by Crusaders and Dunboyne.
When you look at the total membership Galway City Harriers are still coming out on top: