William Caulfeild

• 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, Irish lawyer
• William Caulfeild, 2nd Viscount Charlemont, Irish soldier and MP for Charlemont
• William Caulfeild , British soldier responsible for the construction of roads
• Billy Caulfield, English footballer