| Clipper Flynn | |
| Position: | First baseman |
| Birth Date: | April 29, 1849 |
| Birth Place: | Lansingburgh, New York, U.S. |
| Death Place: | Troy, New York, U.S. |
| Bats: | Unknown |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | May 9 |
| Debutyear: | 1871 |
| Debutteam: | Troy Haymakers |
| Finalleague: | MLB |
| Finaldate: | May 24 |
| Finalyear: | 1872 |
| Finalteam: | Washington Olympics |
| Statleague: | MLB |
| Stat1label: | Games played |
| Stat1value: | 38 |
| Stat2label: | Batting average |
| Stat2value: | .313 |
| Stat3label: | Runs batted in |
| Stat3value: | 29 |
| Teams: |
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William "Clipper" Flynn (April 29, 1849 – November 5, 1881) was an American professional baseball player who played in the National Association as a first baseman for the 1871 Troy Haymakers and the 1872 Washington Olympics.