Belfast Harlequins was formed in 1999 with the merger of Collegians, North of Ireland Cricket Club and North of Ireland Football Club. The former clubs were three of the oldest and most distinguished clubs in Ireland. "North" sold its famous ground at Ormeau – one of the earliest international rugby venues – to pay for the redevelopment of the Deramore Park facilities. The Belfast Harlequins RFC most successful season was in 2004–2005. They finished third in the league table and played at Lansdowne Road in Dublin in the end of season play-offs.
45a Deramore Park, Belfast BT9 5JX