| Frank Greinert | |
| Birth Date: | 5 February 1909 |
| Death Place: | United States |
| Clubs1: | Philadelphia German-Americans |
| Nationalyears1: | 1936 |
| Nationalteam1: | United States |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
Frank Greinert (February 5, 1909 – November 9, 1965) was a U.S. soccer player who was a member of the U.S. soccer team at the 1936 Summer Olympics.[1] At the time, he played for the Philadelphia German-Americans of the American Soccer League.[2]