Welchman is an English surname. Notable people with the surname include:
Edward Welchman (1665–1739), English theologian and Archdeacon of Cardigan Gordon Welchman (1906–1985), English mathematician, academic, codebreaker and writer Harry Welchman (1886–1966), English actor Hugh Welchman (born 1975), British filmmaker, screenwriter and producer Marion Welchman (1915-1997), British charity administrator William Welchman (1866–1954), Archdeacon of Bristol