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