Batman: Gotham by Gaslight is a 2018 American adult animated superhero film produced by Warner Bros. Animation and distributed by Warner Bros. Home Entertainment, featuring an alternate version of the DC Comics character Batman. It is the 31st film of the DC Universe Animated Original Movies. It is directed and produced by Sam Liu and written by James Krieg, loosely based on the standalone graphic novel of the same name by Brian Augustyn and Mike Mignola.

Gotham by Gaslight is a DC Comics one-shot by Brian Augustyn and Mike Mignola, with inks by P. Craig Russell. The story revolves around a 19th-century version of Bruce Wayne making his debut as Batman just as Jack the Ripper has arrived in Gotham City.