Gaslight is the production of artificial light by burning gas.
Gaslight may also refer to:
- Gas Light (1938) a Patrick Hamilton stage play
- Gaslight (1940 film), starring Diana Wynyard, Anton Walbrook, Frank Pettingell, based on the play
- Gaslight (1944 film), directed by George Cukor, starring Ingrid Bergman and Charles Boyer and Angela Lansbury, based on the play
- Gaslight (1958 film), starring Beverley Dunne, based on the play
- Gaslighted: Slappy the Ventriloquist Dummy vs. Aloysius Pendergas; a 2014 novel starring Slappy the Dummy and Aloysius Pendergast by RL Stine and Douglas Preston and Lincoln Child