| Harry Fanwell | |
| Position: | Pitcher |
| Birth Date: | 16 October 1886 |
| Birth Place: | Patapsco, Maryland |
| Death Place: | Somerville, New Jersey |
| Bats: | Left |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | July 23 |
| Debutyear: | 1910 |
| Debutteam: | Cleveland Naps |
| Finalleague: | MLB |
| Finaldate: | October 1 |
| Finalyear: | 1910 |
| Finalteam: | Cleveland Naps |
| Statleague: | MLB |
| Stat1label: | Pitching Record |
| Stat2label: | Earned run average |
| Stat3label: | Strikeouts |
| Stat1value: | 2-9 |
| Stat2value: | 3.62 |
| Stat3value: | 30 |
| Teams: |
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Harry Clayton Fanwell (October 16, 1886 – July 15, 1965) was a Major League Baseball pitcher who played for one season. He pitched 17 games for the Cleveland Naps during the 1910 Cleveland Naps season.