William Ash
William or Bill Ash may refer to:
- William Ash , English Member of Parliament for Dorchester in 1394
- William H. Ash, American former slave and member of the Virginia House of Delegates
- Bill Ash, American-born British writer, Marxist, and World War II RCAF pilot
- Bill Ash, American professional basketball player in the 1940s
- William Ash , British actor