Magnolia will offer the film on its new HDNet Ultra Video On Demand platform, which grants subscribers access to films up to three weeks before their theatrical release.
Richard Roxburgh's feature directorial debut was adapted from Raimond Gaita's memoir about an immigrant couple's struggle to bring up their son in a hostile environment. Marton Csokas also stars and Nick Drake wrote the screenplay.
The film was nominated in all 16 categories for this year's Australian Film Awards, making it the most nominated film in the awards' history.
Robert Connolly and John Maynard produced and Arclight Films chiefs Gary Hamilton and Victor Syrmis served as executive producers along with Andrew Myer.
'This film has been acclaimed everywhere it has been seen, including at this year's Toronto festival,' Hamilton said. 'We think the film is absolutely right for Magnolia Pictures, and we're very proud and happy that they will release it in the US.'
'With a star on the level of Eric Bana and its history of awards, Romulus, My Father is an exciting addition to the Ultra VOD programme, and it highlights the exceptional quality of the films that have been showcased,' Magnolia president Eamonn Bowles said.
Arclight has previously sold the drama in more than 20 territories including Germany, Scandinavia, Italy, Latin America and Canada.