| Prison Name: | Castlerea Prison |
| Pushpin Map: | Ireland |
| Coordinates: | 53.7548°N -8.4889°W |
| Location: | Harristown, Castlerea, County Roscommon, Ireland |
| Status: | Operational |
| Classification: | Medium security |
| Capacity: | 340 |
| Population: | 320 |
| Populationdate: | 2022 |
| Opened: | 1996 |
| Managed By: | Irish Prison Service |
| Governor: | Mr. David Conroy |
Castlerea Prison is a closed category, medium security prison in Castlerea, County Roscommon, Ireland. It houses men over 17 years of age. As of 2022, it had a bed capacity of 340 and the daily average number of resident inmates was 320.[1]
Castlerea was established as part of the system of district mental hospitals in 1939. Operating intermittently as a tuberculosis sanitorium, it continued to function as a hospital until 1994 when it was closed. It was renamed St. Patrick's Hospital during the 1960s. From 1996 it opened as a prison accepting a small intake of inmates that year. Construction work on the main cell blocks of the prison was completed in 1998.[2]