Mayo, a county of Ireland, province of Connaught, bounded E by Roscommon, S by Galway, W and N by the Atlantic, and NE by Sligo, containing 796,000 acres, divided into 68 parishes. It sends 2 members to parliament. The W coast is mountainous, and thinly inhabited; but the interior produces excellent pasturage, and is watered by several lakes and rivers. Mayo has many historical connections including the “Ceide Fields” which contains many Stone Age tombs and monuments.
Mayo’s chief town is Castlebar.