| Steve Libby | |
| Position: | First baseman |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 8 December 1853 |
| Birth Place: | Scarborough, Maine |
| Death Place: | Milford, Connecticut |
| Debutleague: | MLB |
| Debutdate: | May 10 |
| Debutyear: | 1879 |
| Debutteam: | Buffalo Bisons |
| Finalleague: | MLB |
| Finaldate: | May 10 |
| Finalyear: | 1879 |
| Finalteam: | Buffalo Bisons |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | Hits |
| Stat2value: | 0 |
| Stat3label: | Runs |
| Stat3value: | 0 |
| Teams: | |
Stephen Augustus Libby (December 8, 1853 – March 31, 1935) was a baseball player for the Buffalo Bisons of the National League for one game during the 1879 season. He also served as an umpire in the National League for one game in 1879 and eight more in 1880, all of them as the home plate umpire.[1]