Guy Kewney (born April 30, 1946) is a British journalist. He is best known as a personal computing pundit, starting with Personal Computer World in 1978 (he still writes a monthly column for the magazine). He launched NewsWireless.Net in 2002 and is a founding partner of AFAICS Research. His daughter, Lucy Sherriff, is on the staff of The Register.

At the peak of the fame and influence of PCW, Guy Kewney was probably the UK's most influential writer and broadcaster on microcomputing technology , founding and editing trade publications Microscope and PC Dealer, and working as a TV presenter for five years on Thames TV's Database and Channel 4's 4 Computer Buffs before helping launch Ziff-Davis in Britain as the star columnist of PC Magazine UK, PC Direct, Computer Life, IT Week, and ZDNet UK.

BBC News 24 made headlines in May 2006, when they interviewed Guy Goma live on air, mistakenly believing him to be Kewney. News 24 Journalist Karen Bowerman asked the Congolese Economics graduate questions about the Apple Corps v. Apple Computer court case under the impression that he was Kewney.