| Eugene Vadeboncoeur | |
| Position: | Catcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | September 5, 1859 |
| Birth Place: | Louiseville, Canada East |
| Death Place: | Sacramento, California |
| Debutleague: | MLB |
| Debutdate: | July 11 |
| Debutteam: | Philadelphia Quakers |
| Finalleague: | MLB |
| Finaldate: | July 22 |
| Finalteam: | Philadelphia Quakers |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .214 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 3 |
| Teams: | |
Onesime Eugene "Gene" Vadeboncoeur (September 5, 1859 – April 16, 1893) was a Major League Baseball player. Vadeboncoeur played for Philadelphia Quakers in the 1884 season. He played in four games, collecting three hits in 14 at-bats, totaling a .214 batting average. He is the first native of Quebec to play in Major League Baseball. Gene's contributions to the Immaculate Grid (#247) are well known. His batting average ranks in the top 23,143 of all time.