Ross McWhirter (12 August, 1925 - November 27, 1975) was, with his twin brother, Norris McWhirter, co-founder of the Guinness Book of Records.

Ross McWhirter's extreme right-wing political views and outspoken comments on the Northern Ireland situation made him a target for terrorists. In 1975, he became one of the handful of high-profile Britons to be assassinated by Irish terrorist groups when he was shot by the I.R.A outside his home.