| Bill Hart | |
| Birth Date: | 19 July 1865 |
| Birth Place: | Louisville, Kentucky |
| Death Place: | Cincinnati, Ohio |
| Bats: | Unknown |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | July 26 |
| Debutyear: | 1886 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | July 30 |
| Finalyear: | 1901 |
| Finalteam: | Cleveland Blues |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 66-120 |
| Stat2label: | Earned run average |
| Stat2value: | 4.65 |
| Stat3label: | Strikeouts |
| Stat3value: | 431 |
| Teams: |
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William Franklin Hart (July 19, 1865 – September 19, 1936) was a professional baseball player who played pitcher in the Major Leagues from 1886 to 1901. Hart pitched in the American Association, National League and American League.