| Tony Madigan | |
| Birth Date: | 18 July 1868 |
| Birth Place: | Washington, D.C. |
| Death Place: | Washington, D.C. |
| Bats: | Unknown |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | July 10 |
| Debutyear: | 1886 |
| Debutteam: | Washington Nationals |
| Finalleague: | MLB |
| Finaldate: | September 4 |
| Finalyear: | 1886 |
| Finalteam: | Washington Nationals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 1–13 |
| Stat2label: | Earned run average |
| Stat2value: | 4.87 |
| Stat3label: | Strikeouts |
| Stat3value: | 29 |
| Teams: |
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William J. Madigan (July 18, 1868 – December 4, 1954) was a professional baseball pitcher for the 1886 Washington Nationals of the National League. He played for the Binghamton Crickets in the minors in 1887.