Province of Connaught (Connacht) Connacht (Irish: Connachta meaning land of the descendants of Conn, is the western province of Ireland, comprising of Counties Galway (Aran Islands, Inishbofin and Galway City), Leitrim, Mayo, Clare Island (Mayo), Roscommon, and Sligo. In Irish the province is usually CÃºige Chonnacht i.e. the province of Connacht. Its main urban centres are Galway in the south, and Sligo in the north. It has a population of 503,083, the smallest of the four Irish provinces.