Coonty Mayo (Erse: Contae Mhaigh Eo) is ane o the twenty-sax coonties o the Republic o Ireland an ane o the thirty-twa coonties o Ireland. It is locatit in the province o Connacht. The coonty wis named efter the village o Mayo (frae IrishMaigh Eo, meanin "plain of the yew trees"), which is now generally kent as Mayo Abbey. The population o the coonty is 123,839 according to the 2006 census. The coonty's main touns ar Castlebar an Ballina, respectively locatit in the centre an in the north east o the coonty.