Lost Cause (Tory Lanez mixtape)

Lost Cause is the twelfth mixtape by Canadian rapper and singer Tory Lanez, released independently for digital download on October 1, 2014. The mixtape features no guest appearances, while production was handled by Lanez himself alongside Burd & Keyz, Christian Louie, Daniel Worthy, Grave Goods, Matti Free, Noah Beresin, Play Picasso, RL Grime, Ryan Hemsworth, and Syk Sense. The mixtape serves as a follow-up to Lanez's eleventh, Chixtape II (2014).

Lost Cause received generally positive reception from fans and is considered a cult classic. The mixtape was preceded by four singles: "The Mission", "Henny in Hand", "Mama Told Me", and "I-95". For its tenth anniversary, on October 4, 2024, the mixtape was released through Lanez's independent record label, One Umbrella on streaming media, featuring remastered instrumentals while some tracks became longer than their original versions.