William Welsh

William Welsh may refer to:
 * William Welsh (RAF officer) (1891–1962), British Royal Air Force officer
 * Willie Welsh (1907–1987), Scottish rugby player
 * William Welsh (actor) (1870–1946), American actor
 * William Welsh (Canadian politician) (1822–1905), merchant, ship owner and politician in Prince Edward Island
 * William Welsh (footballer) (fl. 1919–20), footballer for Grimsby Town
 * William P. Welsh (1889–1984), American muralist, portrait painter, and illustrator
 * William Halliday Welsh (1879–1972), Scottish rugby union player
 * Bill Welsh (1911–2000), American television announcer
 * Bill Welsh (footballer, born 1908) (1908–1987), Australian rules footballer for Geelong
 * Bill Welsh (footballer, born 1924) (1924–2019), Australian rules footballer for Collingwood
 * William Welsh, brother of John Welsh