| Bill Niles | |
| Position: | Third baseman |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 11 January 1867 |
| Birth Place: | Covington, Kentucky |
| Death Place: | Springfield, Ohio |
| Debutleague: | MLB |
| Debutdate: | May 13 |
| Debutyear: | 1895 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | August 5 |
| Finalyear: | 1895 |
| Finalteam: | Pittsburgh Pirates |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .216 |
| Stat2label: | Hits |
| Stat2value: | 8 |
| Stat3label: | Stolen bases |
| Stat3value: | 2 |
| Teams: | |
William E. Niles (January 11, 1867 – July 3, 1936) was a Major League Baseball player. Niles played for Pittsburgh Pirates in the 1895 season. He played just eleven games in his career, having eight hits in 37 at-bats, a .216 batting average.
Niles was born in Covington, Kentucky, and died in Springfield, Ohio.