Maruyama (written: or ) is a Japanese surname. Notable people with the surname include:
- , Japanese professional wrestler
- , Japanese actor
- , Japanese mathematician
- , Japanese judoka
- , Japanese women's footballer
- , Japanese adventurer and professor of economics
- , Japanese Army officer
- , Japanese scholar
- , Japanese film producer
- Magoroh Maruyama (born 1929), Japanese/American business educator
- Paul Maruyama, an American judoka
- , Japanese swimmer
- , Japanese record producer
- , Japanese engineer
- , Japanese fencer
- , Japanese shogi player
- , Japanese sumo wrestler
- , Japanese boxer
- , Japanese volleyball player
- , Japanese Nordic combined skier
- , Japanese volleyball player
Fictional characters