| John Gilbert | |
| Position: | Shortstop |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | January 8, 1864 |
| Birth Place: | Pottstown, Pennsylvania |
| Death Place: | Pottstown, Pennsylvania |
| Debutleague: | MLB |
| Debutdate: | June 23 |
| Debutteam: | Pittsburgh Alleghenys |
| Finalleague: | MLB |
| Finaldate: | June 23 |
| Finalteam: | Pittsburgh Alleghenys |
| Statleague: | MLB |
| Stat1label: | Games played |
| Stat1value: | 2 |
| Stat2label: | At bats |
| Stat2value: | 8 |
| Stat3label: | Hits |
| Stat3value: | 0 |
| Teams: |
|
John G. Gilbert (January 8, 1864 – November 12, 1903) was a Major League Baseball shortstop. He played in two games for the Pittsburgh Alleghenys, both on June 23, 1890. He started both ends of a doubleheader against the Philadelphia Phillies, collecting eight at bats without a hit. His brother Harry H. Gilbert was his teammate on that team. The Pittsburgh Alleghenies later became the Pittsburgh Pirates.