| Robert Foster | |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | October 6, 1856 |
| Birth Place: | Philadelphia, Pennsylvania |
| Death Place: | Philadelphia, Pennsylvania |
| Debutleague: | MLB |
| Debutdate: | June 18 |
| Debutyear: | 1884 |
| Debutteam: | Philadelphia Keystones |
| Finalleague: | MLB |
| Finaldate: | June 26 |
| Finalyear: | 1884 |
| Finalteam: | Philadelphia Athletics |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .214 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 0 |
| Teams: |
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Robert G. Foster (October 6, 1856 – June 15, 1921) was a 19th-century Major League Baseball player. He played primarily catcher during the 1884 season for the Philadelphia Keystones of the Union Association and the Philadelphia Athletics of the American Association.