County Monaghan

54°14′38″N 7°02′24″W / 54.244°N 7.040°W / 54.244; -7.040

County Monaghan Contae Mhuineacháin
County
Coat of arms
Nickname:  The Drumlin County The Farney County
Motto(s):  Dúthracht agus Dícheall (Irish) "Diligence and Best Endeavour"
Country	Ireland
Province	Ulster
Region	Northern and Western
Established	1585[1]
County town	Monaghan
Government
• Local authority	Monaghan County Council
• Dáil constituency	Cavan–Monaghan
• EP constituency	Midlands–North-West
Area
• Total	1,295 km2 (500 sq mi)
• Rank	28th
Highest elevation (Slieve Beagh)	373 m (1,224 ft)
Population  (2022)[2]
• Total	65,288
• Rank	28th
• Density	50/km2 (130/sq mi)
Time zone	UTC±0 (WET)
• Summer (DST)	UTC+1 (IST)
Eircode routing keys	A75, A81, H18, H23
Telephone area codes	in the South of the County 042 - Carrickmacross and Castleblayney in the North of the County 047 - Clones and Monaghan
Vehicle index mark code	MN
Website	Official website

County Monaghan (/ˈmɒnəhən/ MON-ə-hən;^[3] Irish: Contae Mhuineacháin) is a county in Ireland. It is in the province of Ulster and is part of Border strategic planning area of the Northern and Western Region. It is named after the town of Monaghan. Monaghan County Council is the local authority for the county. The population of the county was 65,288 according to the 2022 census.^[2]

The county has existed since 1585 when the Mac Mathghamhna rulers of Airgíalla agreed to join the Kingdom of Ireland. Following the 20th-century Irish War of Independence and the signing of the Anglo-Irish Treaty, Monaghan was one of three Ulster counties to join the Irish Free State rather than Northern Ireland.