| Willy Baumgärtner | |
| Birth Date: | 23 December 1890 |
| Birth Place: | Berlin, Germany |
| Death Place: | São Paulo, Brazil |
| Position: | Left wing |
| Years1: | 1905–1907 |
| Years2: | 1907–1923 |
| Nationalyears1: | 1908–1909 |
| Nationalteam1: | Germany |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 0 |
Willy Baumgärtner (23 December 1890 – 16 November 1953) was a German international footballer. At age 17 years and 104 days, he is the youngest ever player on the German national side. With his four matches for Germany, he was the record holder from 16 March 1909 to 24 April 1910.