Robinson married Iris Collins on 26 July 1970; they have three children, Jonathan, Gareth and Rebekah. His wife has joined him as a councillor, an MLA and an MP. Their son, Gareth Robinson was also member of Castlereagh (borough). They were the first husband and wife ever to represent Northern Ireland constituencies in Parliament. His daughter, Rebekah, served as his private secretary for his Advice Centre in the East Belfast constituency. Hazel Kerr serves as the office's main secretary. He is a supporter of Rangers and Tottenham Hotspur and has expressed admiration for former Spurs player Gareth Bale. Robinson is also a fan of his local Belfast football team Glentoran.