| Leonard Schoonmaker | |
| Birth Date: | 27 March 1882 |
| Birth Place: | Singac, New Jersey, United States |
| Death Place: | Tulsa, Oklahoma, United States |
| Sport: | Fencing |
| Show-Medals: | yes |
Leon Monroe Schoonmaker[1] (March 27, 1882 - May 30, 1950) was an American fencer.[2] He competed in the individual foil and épée events at the 1920 Summer Olympics.[3] He was a referee in several fencing competitions in the 1932 Summer Olympics in Los Angeles. In the 1930s he served first as a secretary and treasurer and then for term 1934-1935 as the president of Fencing Association of the United States.[4] He was an also an engineer in Queens, New York City.