John August (born August 4, 1970) is an American screenwriter, director, producer, and novelist. He is known for writing the films Go (1999), Charlie's Angels (2000), Charlie's Angels: Full Throttle (2003), Big Fish (2003), Charlie and the Chocolate Factory (2005), Corpse Bride (2005), Frankenweenie (2012), the Disney live-action adaptation of Aladdin (2019), the novels Arlo Finch in the Valley of Fire (2018), Arlo Finch in the Lake of the Moon (2019) and Arlo Finch in the Kingdom of Shadows (2020).

He hosts the screenwriting podcast Scriptnotes with Craig Mazin, maintains an eponymous screenwriting blog, and develops screenwriter-targeted software through his company, Quote-Unquote Apps.