William Daniels (born 1927) is an American actor.
William Daniels may also refer to:
- William Daniels (artist) (born 1976), British painter
- William Daniels (automotive engineer) (1912–2004), British car engineer
- William Daniels (cinematographer) (1901–1970), American cinematographer
- William Antonio Daniels or Kiing Shooter (1992–2020), American rapper
- William B. Daniels (1817–1894), pioneer in Oregon Territory, and in Idaho Territory
- William Henry Daniels (1855–1897), Hawaiian judge and politician
- William Randall Daniels or Billy Dee (born 1951), American pornographic actor