| William Fitz Randolph Mills | |
| Birth Date: | 8 September 1856 |
| Birth Place: | New York City, New York |
| Death Place: | Denver, Colorado |
| Order: | 31st |
| Office: | Mayor of Denver |
| Term Start: | 1918 |
| Term End: | 1919 |
| Predecessor: | Robert W. Speer |
| Successor: | Dewey C. Bailey |
William Fitz Randolph Mills (September 8, 1856 – November 16, 1941) was an American politician who served as the mayor of Denver, Colorado from 1918 to 1919.[1]