Rio Dewanto (born in Jakarta, Indonesia on 28 August 1987) is an Indonesian actor and model of Javanese descent.

In 2011, Dewanto played the lead role as Hendra/Ping Hen, in a drama film that emphasized Indonesian pluralism which was directed by Hanung Bramantyo, titled ?

The next year, Dewanto played as John Evans, the main character in the film Modus Anomali which was directed by Joko Anwar.

Dewanto played his fourth role as Octa in a sequel of a film, titled Arisan!

In addition, Dewanto starred in Indonesian small screens, including the popular drama which aired in SCTV, Love in Paris season 1 and 2.