| John Mansell | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Unknown |
| Birth Date: | 1859 |
| Birth Place: | Auburn, New York, U.S. |
| Death Place: | Romulus, New York, U.S. |
| Debutleague: | MLB |
| Debutdate: | May 9 |
| Debutyear: | 1882 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | July 22 |
| Finalyear: | 1882 |
| Finalteam: | Philadelphia Athletics |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .238 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 17 |
| Teams: |
|
John Mansell (1859 – February 20, 1925) was a 19th-century American Major League Baseball player. He played outfield for the 1882 Philadelphia Athletics in the American Association. His brothers Mike and Tom also played professional baseball.