The Royal baccarat scandal, also known as the Tranby Croft affair, was a British gambling scandal of the late 19th century involving the Prince of Wales—the future King Edward VII. The scandal started during a house party in September 1890, when Sir William Gordon-Cumming, a lieutenant colonel in the Scots Guards, was accused of cheating at baccarat.

Edward VII was King of the United Kingdom and the British Dominions, and Emperor of India, from 22 January 1901 until his death in 1910.