| Billy Milligan | |
| Position: | Pitcher |
| Birth Date: | August 19, 1878 |
| Birth Place: | Buffalo, New York |
| Death Place: | Buffalo, New York |
| Bats: | Right |
| Throws: | Left |
| Debutleague: | MLB |
| Debutdate: | April 30 |
| Debutyear: | 1901 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | May 15 |
| Finalyear: | 1904 |
| Finalteam: | New York Giants |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–4 |
| Stat2label: | Strikeouts |
| Stat2value: | 11 |
| Stat3label: | Earned run average |
| Stat3value: | 4.81 |
| Teams: |
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William Joseph Milligan (August 19, 1878 – October 14, 1928) was an American Major League Baseball pitcher. He played for the Philadelphia Athletics during the season and the New York Giants during the season.[1]