| Office: | Judge of the Court of Appeal |
| Term Start: | 24 October 2014 |
| Term End: | 6 July 2018 |
| Nominator: | Government of Ireland |
| Appointer: | Michael D. Higgins |
| Office1: | Judge of the Circuit Court |
| Term Start1: | 14 April 2002 |
| Term End1: | 20 October 2014 |
| Nominator1: | Government of Ireland |
| Birth Date: | 3 March 1951 |
| Birth Place: | Tullamore, County Offaly, Ireland |
| Nationality: | Irish |
| Education: | Clongowes Wood College |
Alan Mahon (born 3 March 1951) is a retired Irish judge who served as a Judge of the Court of Appeal from 2014 to 2018 and a Judge of the Circuit Court from 2002 to 2014.
He was educated at Clongowes Wood College, University College Dublin and the King's Inns.[1] He was called to the Bar in 1976, and to the Inner Bar in 1988.
He was appointed as a Circuit Court judge in April 2002. He was appointed as a judge of the Tribunal of Inquiry into Certain Planning Matters and Payments in September 2002 and appointed chairman of the tribunal in July 2003. In October 2014, he became a judge of the Court of Appeal.[2] [3]
On 24 April 2018, the Government of Ireland decided to recommend Mahon for appointment as the new Ombudsman for the Defence Forces, for a three-year period with effect from 6 July 2018. Mahon was recommended following an open competition run by the Public Appointments Service. Mahon resigned as a Judge of the Court of Appeal to take up the position, which is a non-judicial position.[4]