William Loraine may refer to:

Sir William Loraine, 2nd Baronet (1658–1744), MP for Northumberland Sir William Loraine, 4th Baronet (1749–1809), of the Loraine baronets Sir William Loraine, 6th Baronet (1801–1849), of the Loraine baronets Sir William Loraine, 9th Baronet (1780–851), of the Loraine baronets