William Caldwell

• 1966 Tasman Series
• Acer campestre 'William Caldwell'
• Bill Caldwell (racing driver)
• Billy Caldwell
• Red River Settlement
• Union Harmony
• Will Caldwell
• William A. Caldwell
• William B. Caldwell (judge)
• William B. Caldwell III
• William B. Caldwell IV
• William Bletterman Caldwell
• William Caldwell (Halifax mayor)
• William Caldwell (Wisconsin politician)
• William Caldwell (cricketer)
• William Caldwell (hymnist)
• William Caldwell (ranger)
• William Clyde Caldwell
• William Hay Caldwell
• William Murray Caldwell
• William Parker Caldwell
• William W. Caldwell
• mayor of Halifax, Nova Scotia