| William Johnson | |
| Position: | Second baseman |
| Birth Date: | 1 June 1848 |
| Birth Place: | Parma, Ohio |
| Death Place: | Albuquerque, New Mexico |
| Bats: | Unknown |
| Throws: | Unknown |
| Debutleague: | MLB |
| Debutdate: | May 20 |
| Debutyear: | 1871 |
| Debutteam: | Cleveland Forest Citys |
| Finalleague: | MLB |
| Finaldate: | September 12 |
| Finalyear: | 1871 |
| Finalteam: | Cleveland Forest Citys |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .224 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3value: | 7 |
| Teams: |
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William Penn Johnson (June 1, 1848 – September 25, 1909) was an American professional baseball player for the Cleveland Forest Citys during the 1871 season. Long identified as "Caleb Johnson", the player's true identity was uncovered in 2015 by Society for American Baseball Research member Peter Morris.[1]