William Brownell
William Brownell may refer to:
- William P. Brownell, American soldier and Medal of Honor recipient
- William Crary Brownell, American literary and art critic
- William A. Whittlesey Brownell, American architect, designer of Acacia Lodge
- William A. Brownell, American educational psychologist
- William E. Brownell, American scientist who conducts research at Baylor College of Medicine
- William Brownell (politician), Australian member of the Tasmanian House of Assembly