Situated on the River Deel, near the northern shores of Lough Conn, Crossmolina is on the N59 road, approx 9km west of Ballina. The town derives its name from the Irish 'Crois Uí Mhaoilíona', meaning the Cross of Mullany. The cross referred to, stands in the town in memory of O'Maolfhiona, a chieftain and member of the local ruling family, Clann Fiachra.