| Birth Date: | 22 September 1913 |
| Birth Place: | Sládkovičovo, Austria-Hungary |
| Death Place: | Pécs, Hungary |
Oszkár Abay-Nemes (22 September 1913 - 30 January 1959) was a Hungarian swimmer who competed in the 1936 Summer Olympics. He was born in Sládkovičovo.
In the 1936 Olympics, he won a bronze medal in the 4 × 200 m freestyle relay event. He was also seventh in his semifinal of the 100 m freestyle event and did not advance.
Abay-Nemes died on 30 January 1959 in Pécs, at the age of 45.