William Barber
William Barber, Bill Barber or Billy Barber may refer to:
Politicians
- William Barber (MP for Bedford), Member of Parliament for Bedford
- William Barber (MP for Dunwich), MP for Dunwich
- William Barber (Ontario politician), Canadian businessman and politician
- William Alonzo Barber, Wisconsin politician, soldier, businessman, banker, and educator
- William Barber (New Zealand politician), New Zealand MP
- William P. Barber, justice of the Connecticut Supreme Court
Sports
- William Barber (Hambledon cricketer), English cricketer of the Hambledon Club in the 1760s and 1770s
- William Barber (Sheffield cricketer), English cricketer, played for Sheffield
- William Barber (Nottinghamshire cricketer), English cricketer who played for Nottinghamshire
- William Barber (cricketer, born 1906), English cricketer
- William Barber (cricketer, born 1919), English cricketer
- Bill Barber, Canadian ice hockey player
- Bill Barber (tennis), American tennis player
- Billy Barber (boxer), Australian boxer
Musicians
- Bill Barber (musician), jazz musician
- Billy Barber (musician), keyboardist and composer
Others
- William Barber II, minister and social activist
- William Barber (engraver), Chief Engraver of the United States Mint
- Sir William Barber, 1st Baronet, English solicitor, property developer and philanthropist
- William E. Barber, United States Marine Corps colonel and Korean War recipient of the Medal of Honor
- William Swinden Barber, Gothic Revival and Arts and Crafts architect