Raymond Gilmour (1959 – October 2016) was an Irish National Liberation Army (INLA) and Provisional Irish Republican Army (IRA) volunteer who worked clandestinely from 1977 to 1982 for the Royal Ulster Constabulary (RUC) within those paramilitary organisations. His testimony was a main element of the supergrass policy, which was aimed at convicting large numbers of paramilitaries.