Others
- William Phillips (British Army officer) (1731–1781), artilleryman and general officer in the British Army who served as a major-general in the American Revolutionary War
- William Phillips (geologist) (1775–1828), British mineralogist who founded the Geological Society of London
- William Phillips (director), Canadian filmmaker who wrote and directed the film Gunless
- William Phillips (economist) (1914–1975), New Zealander known for the Phillips curve and Moniac hydraulic computer
- William Phillips (editor) (1907–2002), American editor and co-founder of Partisan Review
- William T. Phillips (1863–1937), American author
- William Phillips (gunman) (c. 1947–2007), gunman responsible for a standoff with police at the Johnson Space Center, 2007
- William Phillips, Sr. (1722–1804), Boston merchant
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