Jason Dean Hall (born April 28, 1972) is an American screenwriter, film director, and former actor. He played the recurring character of Devon MacLeish in Buffy the Vampire Slayer. He had a guest star on Without a Trace as Jesse in season two.

As a screenwriter, Hall wrote Spread (2009), Paranoia (2003) (with Barry Levy), and the screenplay for American Sniper (2014),[1] for which he received an Academy Award nomination for Best Adapted Screenplay. He then wrote and directed Thank You for Your Service (2017) and co-wrote Gran Turismo (2023).