William Bate may refer to:
- William Bate (Quaker) (died 1700), a founder of Newton Colony, the third English settlement in West New Jersey
- William Thornton Bate (1820–1857), British naval officer
- William B. Bate (1826–1905), American soldier and politician
- William Bate Hardy (1864–1934), British biologist and Fellow of the Royal Society
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