William Rees-Mogg, Baron Rees-Mogg (born July 14, 1928) is a journalist and politician in the United Kingdom.

Rees-Mogg served as editor of The Times newspaper from 1967 to 1981, and still writes comment for the paper. In July 1967 Rees-Mogg wrote the famous editorial "Who Breaks a Butterfly on a Wheel " defending Mick Jagger following the Redlands arrests and attacking the UK laws on cannabis usage. He also was on the BBC's Board of Governors and a chairman of the Arts Council. He was made a life peer in 1988, and sits in the House of Lords as a cross-bencher.

Rees-Mogg's stand on drugs led to him being satarised by Private Eye as 'Mogadon Man '.

His youngest daughter is Annunziata Rees-Mogg, the editor of The European Journal [1], the publication of the leading Eurosceptic thinktank The European Foundation, to which he is a regular contributor.