John Ewen Cameron (20 March 1918 – 29 March 2002) was an Australian baritone singer, who made most of his career in Britain. He became known for his portrayal of characters in modern operas by composers from Australia, Britain and continental Europe, and for his recordings with conductors such as Sir Thomas Beecham, Sir Adrian Boult, the young Colin Davis, and particularly Sir Malcolm Sargent.

Following early concert and operatic experience in Australia he moved to Britain in 1949. He soon was engaged at Covent Garden, where he sang smaller, and some substantial, roles for three seasons. He next sang at Glyndebourne. Over the next 25 years Cameron pursued a career, in both Britain and Australia, in which concert work and recordings played as great a part as opera. From 1976 until the last months of his life Cameron was a teacher on the staff of the Royal Northern College of Music in Manchester.