| Joe Willis | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Left |
| Birth Date: | April 9, 1890 |
| Birth Place: | Coal Grove, Ohio |
| Death Place: | Ironton, Ohio |
| Debutleague: | MLB |
| Debutdate: | May 3 |
| Debutyear: | 1911 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | June 10 |
| Finalyear: | 1913 |
| Finalteam: | St. Louis Cardinals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 4–11 |
| Stat2label: | Strikeouts |
| Stat2value: | 66 |
| Stat3label: | Earned run average |
| Stat3value: | 4.63 |
| Teams: | |
Joseph Denk Willis (April 9, 1890 – December 4, 1966) was a Major League Baseball pitcher. He played all or part of three seasons in the majors, from until, for the St. Louis Browns and St. Louis Cardinals. Following his major league career, he continued to pitch in the minor leagues until 1920.