| John Rainey | |
| Position: | Outfielder / Third baseman |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | July 16, 1864 |
| Birth Place: | Birmingham, Michigan, U.S. |
| Death Place: | Detroit, Michigan, U.S. |
| Debutleague: | MLB |
| Debutdate: | August 25 |
| Debutyear: | 1887 |
| Debutteam: | New York Giants |
| Finalleague: | MLB |
| Finaldate: | July 29 |
| Finalyear: | 1890 |
| Finalteam: | Buffalo Bisons |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .250 |
| Stat2label: | Home runs |
| Stat2value: | 1 |
| Stat3label: | Runs batted in |
| Stat3value: | 32 |
| Teams: |
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John Paul Rainey (July 16, 1864 – November 11, 1912) was an American Major League Baseball player who played for the 1887 New York Giants and 1890 Buffalo Bisons.