Ballymahon (Baile Uí Mhatháin in Irish) in County Longford, Ireland, is the home of the writer Mary Flynn , author of the famous children's book Cornelius Rabbit of Tang.

The village of Tang, Westmeath is nearby, on the road to Athlone, while further along the road is the village of Ballykeeran.

See also: List of towns in the Republic of Ireland