William Caulfeild or Caulfield may refer to:
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William Caulfeild, 2nd Baron Caulfeild (1587–1640),
Baron Caulfeild, Irish Master-General of the Ordnance
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William Caulfeild, 1st Viscount Charlemont (1624–1671), Irish peer, Custos Rotulorum of Armagh and Tyrone
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William Caulfeild (1665–1737), Irish lawyer
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William Caulfeild, 2nd Viscount Charlemont (died 1726), Irish soldier and MP for Charlemont
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William Caulfeild (British Army officer) (died 1767), British soldier responsible for the construction of roads
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Billy Caulfield (1892–1972), English footballer
{{hndis, Caulfeild, William