First Cow is a 2019 American drama film directed by Kelly Reichardt, from a screenplay by Reichardt and Jonathan Raymond based on Raymond's 2004 novel The Half-Life. It stars John Magaro, Orion Lee, Toby Jones, Ewen Bremner, Scott Shepherd, Gary Farmer, Stephen Malkmus, Alia Shawkat, and Lily Gladstone. It also features René Auberjonois in one of his final film roles.

The film had its world premiere at the Telluride Film Festival on August 30, 2019, and was selected to compete for the Golden Bear in the main competition section at the 70th Berlin International Film Festival. It was theatrically released by A24 in the United States on March 6, 2020, and released on VOD platforms on July 10, 2020, to acclaim from critics. It won Best Film at the 2020 New York Film Critics Circle Awards, and was named one of the ten best films of 2020 by the National Board of Review.