William Boyd may refer to:
- William Boyd, 3rd Earl of Kilmarnock (died 1717), Scottish nobleman
- William Boyd, 4th Earl of Kilmarnock (1704–1746), Scottish nobleman
- William Boyd (minister) (died 1772), Irish Presbyterian minister
- William Boyd (pathologist) (1885–1979), Scottish-Canadian professor and author
- William Boyd (actor) (1895–1972), American actor, better known as "Hopalong Cassidy"
- William Boyd (writer) (born 1952), Scottish novelist and screenwriter
- William Boyd (colonel), US Army Air Forces base commander, referenced in Freeman Field Mutiny
- William C. Boyd (1903–1983), American immunologist
- William "Stage" Boyd (1889–1935), American actor
- Bill Boyd (poker player) (1906–1997), professional poker player
- Bill Boyd (baseball) (1852–1912), Major league baseball player
- Bill Boyd (Canadian politician), Saskatchewan Party MLA for the constituency of Kindersley
- Bill Boyd (musician) (1910–1977), leader of the 1930s Western swing band, Bill Boyd and the Cowboy Ramblers
- Will Boyd (born 1979), American bass guitarist for the band Evanescence
Famous quotes containing the words william and/or boyd:
“Well, if I were going to haunt anybody, this would certainly be the house I’d do it in.”
—Robb White, and William Castle. Lance Schroeder (Richard Long)
“Unhappy is the man for evermair
That tills the sand and sawis in the air;
But twice unhappier is he, I lairn,
That feidis in his hairt a mad desire
And follows on a woman thro the fire,
Led by a blind and teachit by a bairn.”
—Mark Alexander Boyd (1563–1601)