Swim Ireland (Irish: Cumann Snámh Éireann) is the national governing body of swimming, diving, water polo, open water swimming and synchronised swimming in the island of Ireland (Republic of Ireland and Northern Ireland). Competitors from Northern Ireland can opt to compete for British Swimming in international competitions, with the exception of the Commonwealth Games where they can compete for Northern Ireland. Swim Ireland is affiliated with LEN, FINA and the Olympic Council of Ireland.