| John Irwin | |
| Position: | Third baseman |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | July 21, 1861 |
| Birth Place: | Toronto, Ontario, Canada |
| Death Place: | Boston, Massachusetts, U.S. |
| Debutleague: | MLB |
| Debutdate: | May 31 |
| Debutyear: | 1882 |
| Debutteam: | Worcester Ruby Legs |
| Finalleague: | MLB |
| Finaldate: | August 8 |
| Finalyear: | 1896 |
| Finalteam: | Louisville Colonels |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .246 |
| Stat2label: | Home runs |
| Stat2value: | 3 |
| Stat3label: | Runs batten in |
| Stat3value: | 93 |
| Teams: | |
John Irwin (July 21, 1861 - February 28, 1934) was an American third baseman in Major League Baseball in the 19th century.