The Royal Irish Constabulary and was Ireland's armed country-wide police force between 1822 in 1922 and 85,028 men passed through its ranks. Dublin had its own unarmed Dublin Metropolitan Police from 1836 to 1925.
The RIC was instrumental in organizing practically all the police forces in the British Colonies.
The RIC was disbanded on 31 August 1922 and replaced in the Irish Free State by the Garda Siochana (formed on 21 February 1922) and replaced in Northern Ireland by the Royal Ulster Constabulary (formed on 1 June 1922).
The original registers of service of the RIC are kept in the Public Records Office, Kew, Richmond, Surrey, England, with microfilm copies available at various centers world-wide. The purpose of Royal Irish Constabulary Ancestry is to identify, locate RIC descendants who can supplement the service records with individual genealogical information, which is then added to the Royal Irish Constabulary Database and make this information available to genealogists.