Ryōma Maruoka is a Japanese voice actor affiliated with the talent agency KeKKe Corporation. He was born on September 8 in Aomori Prefecture, Japan. He has AB blood type and a height of 176cm. His agency profile lists his hobbies as collecting goshuin (shrine seals), visiting vintage clothing stores, and eating ramen.

Maruoka has voiced characters in several anime series and other media. In the second season of the anime adaptation of Tower of God, titled Tower of God: Return of the Prince, he provides the Japanese voice for the character Michael. The character is a member of the Khun family and was introduced in the series as part of a new group of cast members. Maruoka also voices the role of Suua Kubara (also written as Kabara Sua or 華原すうあ) in the project I.ADORE. His other anime voice credits include a role in Oshi no Ko. He has also performed voice work for audio books, narrations for a music variety program, a Western confectionery commercial, and a travel variety show.

In addition to his voice acting, Maruoka has appeared on camera. His on-screen credits include a commercial for the confectionery company Bourbon's Alfort chocolate and an appearance as an extra in the Netflix series The Queen of Villains.

For stage work, he performed the role of Taishi Kaga in the production Fried BALL Project vol.58, titled Oblivion Rondo. He is also credited with voice roles for the games The Reincarnation of the Gods: The Overflowing Romance of the Three Kingdoms and Don't Expose My Sub. There is no public information regarding recurring collaborations with specific directors, studios, or other voice actors, nor are there documented major industry awards or notable achievements beyond his credited roles.