Castlerea
| Castlerea An Caisleán Riabhach | |
|---|---|
| Town | |
| Main Street, Castelrea | |
| Coordinates: 53°46′00″N 8°30′00″W / 53.7667°N 8.5°W | |
| Country | Ireland | 
| Province | Connacht | 
| County | Roscommon | 
| Elevation | 82 m (269 ft) | 
| Population  (2022) | 2,348 | 
| Eircode routing key | F45 | 
| Telephone area code | +353(0)94 | 
| Irish Grid Reference | M670797 | 
Castlerea (/ˌkæsəlˈriː/ KASS-əl-REE; Irish: An Caisleán Riabhach, meaning 'brindled castle') is a town in County Roscommon, Ireland. It is located in the west of the county and had a population of 2,348 at the 2022 census. Roughly translated from Irish, Castlerea is generally thought to mean 'brindled castle' (Caisleán Riabhach). An alternative translation is 'castle of the king' (Caisleán Rí). The town is built on the banks of the River Suck and the River Francis, both of which are tributaries of the River Shannon.