Onni Tommila (born 18 July 1999) is a Finnish actor, known for the films Last Cowboy Standing (2009), Rare Exports: A Christmas Tale (2010) and Big Game (2014). Tommila also appeared in the 2005 Rare Exports: The Official Safety Instructions . He was also the voice of Eetu in the animated film Eetu ja Konna  (2011).

He is the son of actor Jorma Tommila  and scenic designer Ida Helander-Tommila. Director Jalmari Helander is his maternal uncle, and is said to have had Onni in mind for the leading role in Big Game while he was devising the film.