James Mark Court Delingpole (born 6 August 1965) is an English writer, journalist, and columnist who has written for a number of publications, including the Daily Mail, the Daily Express, The Times, The Daily Telegraph, and The Spectator. He is a former executive editor for Breitbart London, and has published several novels and four political books. He describes himself as a libertarian conservative. He has frequently published articles promoting climate change denial and expressing opposition to wind power.

Delingpole grew up near Bromsgrove, Worcestershire, the son of a businessman. He attended Malvern College from 1978 to 1983, an independent school for boys, followed by Christ Church, Oxford (1983–1986), where he studied English language and literature.

In addition to writing articles and commentary for the Daily Mail, the Daily Express, The Times, The Daily Telegraph, and The Spectator, Delingpole has published four political books including: How to be Right: The Essential Guide to Making Lefty Liberals History, Welcome to Obamaland: I Have Seen Your Future and It Doesn't Work, and 365 Ways to Drive a Liberal Crazy.

Delingpole is the author of several novels including Fin and Thinly Disguised Autobiography. In August 2007, Bloomsbury published his first novel of the "Coward" series, Coward on the Beach, which tells the story of a man's reluctant quest for military glory and is set on the beaches of Normandy during the D-Day landings. In June 2009 the second novel of the series, Coward at the Bridge (set during Operation Market Garden in September 1944), was published.

In 2005, Delingpole presented the Channel 4 documentary The British Upper Class, which was part of a series of three documentaries on the class system in Britain. Writing in The Guardian, the television reviewer Charlie Brooker concludes that "Delingpole succeeds in improving the image of the upper classes. Whenever he opens his mouth to defend them, they magically become 50 times less irritating. Than him."

Delingpole has been highly critical of wind farms. He has called wind turbines "environmentally damaging" and suggested that they deface the countryside.

In 2012, Delingpole began Bogpaper, a satirical blog, with Jan Skoyles. In 2013, Delingpole apologised after describing an article by a fellow journalist, which attacked the views of columnist Suzanne Moore, as giving her "such a seeing-to, she'll be walking bow-legged for weeks."

In 2015, Delingpole was named as a source for Lord Ashcroft's unauthorised biography of David Cameron (co-authored with journalist Isabel Oakeshott), Call Me Dave, about Cameron's time at university, in which Delingpole claims to have smoked cannabis with the future PM.