The Irish Republican Socialist Party or IRSP is a small Marxist-Leninist and Irish republican communist party in Ireland. It is associated with the Irish National Liberation Army (INLA) paramilitary group. The party's youth wing is the Republican Socialist Youth Movement (RSYM). It was founded by former members of 'Official' Sinn Féin in 1974 during the Troubles. Initially it described itself as a socialist Irish republican party, but in 1984 it adopted Marxism–Leninism. The party opposes the Good Friday Agreement and the European Union. It has no elected representatives.
- Country
- Ireland, United Kingdom
- Headquarters
- Belfast
- Inception
- December 8, 1974
