| Oskar Kaplur | |
| Birth Date: | 20 September 1889 |
| Birth Place: | Reval, Governorate of Estonia, Russian Empire |
| Death Place: | Moscow, Russian SFSR, Soviet Union |
| Olympic Team: | Russia |
Oskar Kaplur (ru|Оска́р Фри́дрихович Каплю́р; - 20 September 1962) was an Estonian wrestler.[1] He competed for the Russian Empire in the lightweight event at the 1912 Summer Olympics.[2]
He lived in the United States from 1913 to 1918 but returned to Russia in 1918 and worked in the aircraft industry. He was known as the inventor of Kaplyurit plastic-impregnated plywood reinforced with internal steel gauze.[3]