The Mahon Road Barracks was a military installation in Portadown, Northern Ireland.

[2] The barracks were also the home of G Squadron, 22nd SAS Regiment and were the centre of many of their operations in Northern Ireland including the interception of eight members of a Provisional Irish Republican Army team at Loughgall RUC Barracks in 1987;[3] G Squadron operated under the working name of 4 Field Survey Troop, Royal Engineers.

[4] 3rd brigade was moved to Drumadd Barracks in Armagh in 1988 during a restructuring of land forces in Northern Ireland.

[5] In July 2000 the barracks were used by the security forces during the Drumcree conflict.

[7] The adjacent site to the South has since been marketed as a private housing development under the name "Maghon Park".