Stewart Mackie Houston (born 20 August 1949) is a Scottish former football player and coach who played as a left-back. Born in Dunoon, he began his professional career in 1967 with Chelsea, before moving across London to Brentford in 1972. After two years with Brentford, he joined Manchester United, where he spent seven years, making 250 appearances. He then spent three years with Sheffield United, and another three with Colchester United to end his career.