William Turnbull

William Turnbull may refer to:


 * William Turnbull (bishop) (died 1454), Scottish bishop
 * William Turnbull (cricketer) (1879–1959), Scottish cricketer
 * Bill Turnbull (1956–2022), British journalist and presenter
 * Bill Turnbull (actor), Canadian actor active 1995–present
 * William Turnbull (artist) (1922–2012), Scottish artist
 * William Turnbull Jr. (1935–1997), American architect
 * William Turnbull (New Zealand architect) (1868–1941), architect based in Wellington, New Zealand
 * William Turnbull (sailor) (born 1933), Hong Kong sailor
 * William Barclay Turnbull (1811–1863), Scottish antiquary
 * William D. Turnbull (1922–2011), American paleontologist