|Full name||Gary Mackay|
|Date of birth||23 January 1964|
|Place of birth||Edinburgh, Scotland|
|Height||5 ft 9 in (1.75 m)|
|1980–1997||Heart of Midlothian||516||(45)|
* Senior club appearances and goals counted for the domestic league only.
Mackay played for Heart of Midlothian for most of his career, and he holds the record for the most competitive appearances for the club, with 640. Mackay won international recognition in the late 1980s, winning four caps for Scotland. His most significant act as a Scotland player was to score the winning goal in a UEFA Euro 1988 qualifying match against Bulgaria in Sofia. Although this goal did not substantially benefit Scotland, who had already been eliminated, it was of great significance to Ireland, who qualified for the finals as a result of this strike.
Mackay is involved in work for 'Show Racism the Red Card' which primarily aims to prevent racism in football.
Mackay left Hearts in 1997 to play for Airdrie. After retiring as a player in 1999, Mackay then managed Airdrie for a season, but the club suffered severe financial problems and he was sacked to make way for Steve Archibald during July 2000.
Mackay has since worked as an agent, representing players including Garry O'Connor, Christophe Berra and Lee Wallace. Mackay was criticised by his former club Hearts in June 2011 on the official Hearts website. "Over a short space of time 4 players at our club have been on the wrong end of the law. We note that 3 of them are represented by the same agent - Gary Mackay - who has been so vicious in his attacks against Mr Romanov".
- Players' Agents, Scottish Football Association.
- Hearts Players by Appearances, London Hearts.
- The goal of his life, Evening Herald, 11 December 2008.
- Show Racism the Red Card.
- "Sacked Airdrie players to appeal". BBC News. BBC. 16 June 2000.
- "Airdrie have new Mackay in the frame". The Scotsman. Johnston Publishing. 20 July 2000.
- "Smith dismayed at absent O'Connor". BBC Sport. BBC. 9 October 2006.
- "Berra has hunger for Wolves' Premier bid". Edinburgh Evening News (Johnston Publishing). 4 February 2009.
- "'Airgun' footballer pleads guilty". BBC News. BBC. 6 September 2006.
- "Gary Mackay vicious in his attacks against Mr Romanov". Heart of Midlothian FC. 24 June 2011. Retrieved 9 June 2013.