The Genie Award for Best Theatrical Short Film is a Canadian film award, historically presented by the Academy of Canadian Cinema and Television through its Genie Awards program to a film judged as the year's best short film.
When presented, the award has been inclusive of short films in the live action drama, animated and documentary genres. In years when the award was not presented, the Academy has presented separate awards for Best Live Action Short Drama, Best Animated Short and Best Documentary Short. The award has not been presented since the 17th Genie Awards in 1996; in all subsequent Genie or Canadian Screen Award ceremonies, the separate genre categories have been presented instead.