| Irish police forces |
|---|
| Defunct Irish police forces |
| Royal Irish Constabulary (1822–1922) |
| Dublin Metropolitan Police (1836–1925) |
| Irish Republican Police (Irish Republic 1920–1922) |
| Royal Ulster Constabulary (1922–2001) |
| Current Irish police forces |
| Northern Ireland |
| Belfast Harbour Police (1847) |
| Larne Harbour Police (1847) |
| Royal Military Police (1946) |
| Belfast International Airport Constabulary (1994) |
| Police Service of Northern Ireland (2001) |
| Ministry of Defence Police (2004) |
| Republic of Ireland |
| Garda Síochána (1922) |
| Póilíní Airm (1922) |
| Garda Síochána Reserve (2006) |
