| John Fox | |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 7 February 1859 |
| Birth Place: | Roxbury, Massachusetts, U.S. |
| Death Place: | Boston, Massachusetts, U.S. |
| Debutleague: | MLB |
| Debutdate: | June 2 |
| Debutyear: | 1881 |
| Debutteam: | Boston Red Caps |
| Finalleague: | MLB |
| Finaldate: | August 9 |
| Finalyear: | 1886 |
| Finalteam: | Washington Nationals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 13–28 |
| Stat2label: | Earned run average |
| Stat2value: | 4.16 |
| Stat3label: | Strikeouts |
| Stat3value: | 104 |
| Teams: |
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John Joseph Fox (February 7, 1859 – April 16, 1893) was a professional baseball player who played pitcher in the Major Leagues from 1881 to 1886. He played for the Boston Red Caps, Baltimore Orioles, Pittsburgh Alleghenys, and Washington Nationals.