County Roscommon

County Roscommon
Contae Ros Comáin
Motto: 
Latin: Constans Hiberniae Cor
"Steadfast Irish heart"
Interactive map of County Roscommon
CountryIreland
ProvinceConnacht
RegionNorthern and Western
Establishedc. 1569
County townRoscommon
Government
 • Local authorityRoscommon County Council
 • Dáil constituencyRoscommon–Galway
 • EP constituencyMidlands–North-West
Area
 • Total
2,548 km2 (984 sq mi)
 • Rank11th
Highest elevation428 m (1,404 ft)
Population
 (2022)
 • Total
70,259
 • Rank26th
 • Density27.57/km2 (71.42/sq mi)
Time zoneUTC±0 (WET)
 • Summer (DST)UTC+1 (IST)
Eircode routing keys
F42, F45, F52 (primarily)
Telephone area codes071, 090 (primarily)
ISO 3166 codeIE-RN
Vehicle index
mark code
RN
WebsiteOfficial website

County Roscommon (Irish: Contae Ros Comáin) is a county in Ireland. It is part of the province of Connacht and the Northern and Western Region. It is the 11th largest Irish county by area and 26th most populous. Its county town and largest town is Roscommon. Roscommon County Council is the local authority for the county. The population of the county was 70,259 as of the 2022 census.