William Caulfeild may refer to:
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William Caulfeild, 2nd Baron Caulfeild (1587–1640),
Baron Caulfeild
Baron is a rank of nobility or title of honour, often hereditary, in various European countries, either current or historical. The female equivalent is baroness. Typically, the title denotes an aristocrat who ranks higher than a lord or knigh ...
, 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),
Viscount Charlemont, 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
{{hndis, Caulfeild, William