John Athy () was Sovereign of Galway.
Athy was a member of one of the fourteen families that would later become known as the Tribes of Galway. Several members of the family were killed in a feud with the Blake family, c. 1440.
See also Margaret Athy
References History of Galway, James Hardiman, 1820 Old Galway, Maureen Donovan O'Sullivan, 1942 Henry, William (2002). Role of Honour: The Mayors of Galway City 1485-2001. Galway: Galway City Council. Martyn, Adrian (2016). The Tribes of Galway:1124-1642