Oyama could refer to:
- Oyama, a security officer aboard the USS Enterprise
- Mas Oyama, a 20th century karate master
- Mika Oyama, a casualty of the Borg invasion of sector 22093 in the First Splinter timeline
- USS Oyama (NCC-4431), a Larson-class starship
- Other ships named USS Oyama can be spawned in Star Trek Infinite
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