William Riddell (disambiguation)

William Riddell (1807–1847) was a Roman Catholic bishop.

William Riddell may also refer to:

• James Riddell (skier) (born William James Riddell; 1909–2000), British skier and author
• W. G. Riddell (1865–1957), New Zealand magistrate
• W. J. B. Riddell (1899–1976), Scottish ophthalmologist
• William Renwick Riddell (1852–1945), Canadian lawyer, judge, and historian