Sir Kenneth Mather CBE FRS (22 June 1911 – 20 March 1990) was a British geneticist and botanist. He was elected a Fellow of the Royal Society in 1949, and won its Darwin Medal in 1964. He was the second vice chancellor of the University of Southampton serving from 1965-1971. He was instrumental in persuading the University Grants Committee to establish a new Medical School at the university.