William Case (1818–1862) was an American politician.

William Case or Bill Case may also refer to:

William Case (cricketer) (1873–1922), English cricketer W. R. Case & Sons Cutlery Co., an American manufacturer William S. Case (1863–1921), associate justice of the Connecticut Supreme Court William Case, a character in Blackhawk (serial) William Case, of the 1784 Dutch corvette Scipio Bill Case (Oklahoma politician) (born 1954), an American politician from Oklahoma

See also William Casey (disambiguation)