Instonians is a sports club based in Belfast, Northern Ireland, that incorporates rugby union, men's and ladies' hockey and cricket sections.

Shane Park was sold for redevelopment in 1999 and the club now groundshares at the Shaw's Bridge Sports Complex with Cooke.

31 Instonians rugby players have been capped by Ireland at full International level and the club has produced two British and Irish Lions captains.

Membership was initially made up from wives, sisters, daughters and girlfriends of Inst old boys and staff.

In association with Royal Belfast Academical Institution the club have just completed the purchase and laying of a water-based artificial turf playing surface at the Shaws Bridge Sports Complex.