William Waddell
William or Willie Waddell may refer to:
- Willie Waddell, Scottish footballer and manager for Rangers F.C.
- Willie Waddell (footballer, born 1919), less well known Scottish footballer, played for Aberdeen and Kettering Town
- William B. Waddell (Pony Express founder), founder, owner, and operator of the Pony Express
- William B. Waddell (Manitoba politician), Canadian politician
- William Bell Waddell, American politician and judge from Pennsylvania
- William Gillan Waddell, classical scholar and translator