Maruyama (written: 丸山 or 圓山) is a Japanese surname. Notable people with the surname include:

• Atsushi Maruyama (丸山 敦, born 1976), Japanese professional wrestler
• Atsushi Maruyama (actor) (丸山 敦史, born 1983), Japanese actor
• Gisiro Maruyama (丸山 儀四郎, born 1916), Japanese mathematician
• Joshiro Maruyama (丸山 城志郎, born 1993), Japanese judoka
• Karina Maruyama (丸山 桂里奈, born 1983), Japanese women's footballer
• Kunio Maruyama (丸山 邦雄, born 1903), Japanese adventurer and professor of economics
• Masao Maruyama (Japanese Army officer) (丸山 政男, born 1889), Japanese Army officer
• Masao Maruyama (scholar) (丸山 眞男, born 1914), Japanese scholar
• Masao Maruyama (film producer) (丸山 正雄, born 1941), Japanese film producer
• Magoroh Maruyama (born 1929), Japanese/American business educator
• Paul Maruyama, an American judoka
• Shigemori Maruyama (丸山 繁守, born 1967), Japanese swimmer
• Shigeo Maruyama (丸山 茂雄, born 1941), Japanese record producer
• Shigeo Maruyama (engineer) (丸山 茂夫), Japanese engineer
• Shiro Maruyama (圓山 詩郎, born 1948), Japanese fencer
• Tadahisa Maruyama (丸山 忠久, born 1970), Japanese shogi player
• Takahiko Maruyama (丸山 孝彦, born 1946), Japanese sumo wrestler
• Tadayuki Maruyama (丸山 忠行, born 1942), Japanese boxer
• Takashi Maruyama (丸山 孝, born 1953), Japanese volleyball player
• Toshiaki Maruyama (丸山 寿明, born 1959), Japanese Nordic combined skier
• Yuko Maruyama (丸山 裕子, born 1989), Japanese volleyball player

Fictional characters

• Aya Maruyama (丸山 彩), a character in the multimedia franchise BanG Dream!