| Frank Siffell | |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 1861 |
| Birth Place: | Germany |
| Death Place: | Philadelphia, Pennsylvania |
| Debutleague: | MLB |
| Debutdate: | June 14 |
| Debutyear: | 1884 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | September 16 |
| Finalyear: | 1885 |
| Finalteam: | Philadelphia Athletics |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .148 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 3 |
| Teams: |
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Frank Siffell (1861 – 26 October, 1909) was a 19th-century Major League Baseball player. He played primarily catcher during the 1884 and 1885 seasons for the Philadelphia Athletics of the American Association.