| Bill McCarthy | |
| Position: | Catcher |
| Bats: | Unknown |
| Throws: | Right |
| Birth Date: | 14 February 1886 |
| Birth Place: | Boston, Massachusetts |
| Death Place: | Washington, D.C. |
| Debutleague: | MLB |
| Debutdate: | June 5 |
| Debutyear: | 1905 |
| Debutteam: | Boston Beaneaters |
| Finalleague: | MLB |
| Finaldate: | September 14 |
| Finalyear: | 1907 |
| Finalteam: | Cincinnati Reds |
| Statleague: | MLB |
| Stat1label: | Games played |
| Stat1value: | 4 |
| Stat2label: | At bats |
| Stat2value: | 11 |
| Stat3label: | Hits |
| Stat3value: | 1 |
| Teams: |
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William John McCarthy (February 14, 1886 - February 4, 1928) was a professional baseball catcher. He played parts of two seasons in Major League Baseball, for the Boston Beaneaters in 1905 and the Cincinnati Reds in 1907. He attended Fordham University.