William McDowell
William McDowell may refer to:
- William Fraser McDowell, American bishop
- William John McDowell, Northern Irish politician
- William Osborn McDowell, American financier and businessman
- W. W. McDowell, American politician and diplomat
- William McDowell (cricketer), Scottish cricketer
- William McDowell (musician), American musician
- William D. McDowell, politician and sheriff in New Jersey
- William Hugh McDowell, VMI cadet killed at the Battle of New Market
- William G. McDowell, American bishop of Alabama