Keith H. S. Campbell (born 1954) is an English biologist who was a member of the team that in 1996 first cloned a mammal, a Finnish Dorset lamb named Dolly, from fully differentiated adult mammary cells.

Campbell grew up in Birmingham in England and Perth, Scotland. He obtained his bachelor's degree in microbiology from the University of London and his doctoral degree from the University of Sussex (Brighton, UK).

Campbell's interest in cloning mammals was inspired by work done by Karl Illmensee and John Gurdon.