| William J. Barker | |
| Birth Date: | December 23, 1831 |
| Birth Place: | Watkins, New York |
| Death Date: | March 27, 1900 (aged 68) |
| Death Place: | Denver Colorado, United States |
| Order: | 12th |
| Office: | Mayor of Denver |
| Term Start: | 1874 |
| Term End: | 1876 |
| Predecessor: | Francis M. Case |
| Successor: | R. G. Buckingham |
William J. Barker (December 23, 1831 - March 27, 1900) was an American politician who served as the mayor of Denver, Colorado from 1874 to 1876.[1] He was a pioneer and moved to Denver in 1860,[2] buying a large amount of property. 1876, Barker's last year as mayor office, is the same year Colorado was granted statehood.[3]
He is buried in the Fairmount Cemetery.[4]