Crowther is a surname, derived from the old Welsh musical instrument the crwth. Notable people with the surname include:
Arnold Crowther, stage-magician, puppeteer, and promoter of Wicca religion
Antony Crowther, British computer programmer
Bosley Crowther (1905–1981), American film critic
Charles Crowther (1831–1894), Australian politician
Emlyn Crowther (born 1949), New Zealand drummer
Geoffrey Crowther, Baron Crowther (1907–1972), English politician
Hal Crowther (born 1945), American journalist and essayist
Hilton Crowther (b.1879), English mill owner and football club chairman
John Edward Crowther, (1863–1931) English mill owner and philanthropist
Joseph Stretch Crowther (1820–93) English architect
Leslie Crowther (1933–1996), English comedian
Liz Crowther (born 1954), English actress
Patricia Crowther (born 1943), American cave explorer
Paul Crowther (born 1953), English professor of philosophy
Patricia Crowther (born 1927), promoter of Wicca religion
Samuel Ajayi Crowther (1809–1891), Nigerian bishop
Stan Crowther (footballer) (born 1935), English footballer
Stanley Crowther (1925–2013), English politician
William Crowther (born 1936), American computer programmer
William Crowther (Australian politician) (1817–1885), Australian politician
William Crowther (1834 – 1900), New Zealand politician