John Wonnacott, born in 1940 in London, is a British painter. Wonnacott trained at the Slade School of Fine Art during 1958–63. He then moved to Southend-on-Sea, Essex, and still lives there. In 2000, he painted the British Royal Family in a 12-foot tall artwork. Wonnacott is a Commander of the Order of the British Empire (CBE), awarded in 2000. He was the 2005 winner of the Ondaatje Prize for portraiture.