County Mayo

County Mayo

Contae Mhaigh Eo
Coat of arms of County Mayo
Coat of arms
The Yew County
Dia is Muire Linn  (Irish)
"God and Mary be with us"
Location of County Mayo
Dáil ÉireannMayo
EU ParliamentMidlands–North-West
Establishedc. 1570[1]
County townCastlebar Coat of Arms.pngCastlebar
 • TypeCounty Council
 • Total5,586 km2 (2,157 sq mi)
Area rank3rd
 • Total130,507
 • Rank17th
 • Density23/km2 (61/sq mi)
Time zoneUTC±0 (WET)
 • Summer (DST)UTC+1 (IST)
Eircode routing keys
F12, F23, F26, F28, F31, F35 (primarily)
Telephone area codes093–098 (primarily)

County Mayo (Irish: Contae Mhaigh Eo, meaning "Plain of the yew trees") is a county in Ireland. In the West of Ireland, in the province of Connacht, it is named after the village of Mayo, now generally known as Mayo Abbey. Mayo County Council is the local authority. The population was 130,507 at the 2016 census.[2] The boundaries of the county, which was formed in 1585, reflect the Mac William Íochtar lordship at that time.


It is bounded on the north and west by the Atlantic Ocean; to the south by County Galway; the east by County Roscommon; and the northeast by County Sligo. Mayo is the third-largest of Ireland's 32 counties in area and 15th largest in terms of population.[3] It is the second-largest of Connacht’s five counties in both size and population. Mayo is located along the west coast of Ireland which is approximately 7,400 km in length.[4] There is a distinct geological difference between the west and the east of the county. The west consists largely of poor subsoils and is covered with large areas of extensive Atlantic blanket bog, whereas the east is largely a limestone landscape. Agricultural land is therefore more productive in the east than in the west.

  • The highest point in Mayo (and Connacht) is Mweelrea, at 814 m (2,671 ft)
  • The River Moy in the northeast of the county is renowned for its salmon fishing
  • Ireland's largest island, Achill Island, lies off Mayo's west coast
  • Mayo has Ireland's highest cliffs at Croaghaun, Achill Island,[5] while the Benwee Head cliffs in Kilcommon Erris drop almost perpendicularly 900 feet (270 m) into the Atlantic Ocean.[6]
  • The northwest areas of County Mayo have some of the best renewable energy resources in Europe, if not the world, in terms of wind resources, ocean wave, tidal and hydroelectric resources[7][8][9]

Local government and political subdivisions

Mayo County Council (Irish: Comhairle Contae Mhaigh Eo) is the authority responsible for local government. As a county council, it is governed by the Local Government Act 2001. The County is divided into four municipal areas Castlebar, Ballina, Claremorris and West (an area which stretches from Westport to Belmullet). The council is responsible for housing and community, roads and transportation, urban planning and development, amenity and culture, and environment. For the purpose of local elections the county is divided into its four municipal districts, replacing the former six local electoral areas: Ballina (6), Belmullet (4), Castlebar (7), Claremorris (6), Swinford (4) and Westport (4).[10] The county town is at Áras an Contae in Castlebar, the main population centre located in the centre of the county. For national elections, half of the Claremorris Municipal District is in Galway West, and stretches from Ashford Castle to Ireland West Airport.

The Municipal Area populations are as follows:

  • Ballina – 32,979
  • Castlebar – 34,000
  • Claremorris – 32,469
  • West Mayo – 31,190
Near Roonagh Quay looking towards Croagh Patrick

There are nine historic baronies, four in the northern area and five in the south of the county:

North Mayo

South Mayo

Largest towns by population (according to the 2016 Census)

  1. Castlebar – 13,496
  2. Ballina – 10,623
  3. Westport – 5,894
  4. Claremorris – 4,487
  5. Ballinrobe – 3,685

Flora and fauna

A survey of the terrestrial and freshwater algae of Clare Island was made between 1990 and 2005 and published in 2007. A record of Gunnera tinctoria is also noted.[11]

Consultants working for the Corrib gas project have carried out extensive surveys of wildlife flora and fauna in Kilcommon Parish, Erris between 2002 and 2009. This information is published in the Corrib Gas Proposal Environmental impact statements 2009 and 2010.[12]

Other Languages
Ænglisc: Mageoscīr
العربية: مقاطعة مايو
asturianu: Condáu de Mayo
български: Мейо
Cebuano: Maigh Eo
čeština: Hrabství Mayo
Cymraeg: Swydd Mayo
Deutsch: County Mayo
español: Condado de Mayo
Esperanto: Graflando Mayo
føroyskt: Mayo (Írland)
français: Comté de Mayo
Gàidhlig: Contae Mhaigh Eo
한국어: 메이요주
íslenska: County Mayo
italiano: Contea di Mayo
עברית: מחוז מאיו
Kiswahili: Wilaya ya Mayo
lietuvių: Mėjo grafystė
magyar: Mayo megye
македонски: Мејо (грофовија)
Nederlands: County Mayo
日本語: メイヨー州
norsk nynorsk: County Mayo
پنجابی: میو
português: Condado de Mayo
română: Comitatul Mayo
Simple English: County Mayo
slovenčina: Mayo (grófstvo)
српски / srpski: Мејо (округ)
srpskohrvatski / српскохрватски: Mayo (grofovija)
Türkçe: Mayo Kontluğu
українська: Мейо (графство)
vèneto: Mayo
中文: 梅奧郡