Baj or BAJ may refer to:
Baja California ( /ˈbaxa kaliˈfornja/ ), (English: Lower California), officially the Free and Sovereign State of Baja California (Spanish: Estado Libre y Soberano de Baja California), is a state in Mexico.
Bajirao Mastani is a 2015 Indian epic historical romance film directed by Sanjay Leela Bhansali, who also composed the music of the film.
Bajrangi Bhaijaan (English translation: Brother Bajrangi) is a 2015 Indian comedy-drama film directed by Kabir Khan.
Bajaj Auto Limited is an Indian two-wheeler and three-wheeler manufacturing company. Bajaj Auto manufactures and sells motorcycles, scooters and auto rickshaws.
In the Star Trek science-fiction franchise, the Bajorans are a humanoid extraterrestrial species native to the planet Bajor.
The SCORE Baja 1000 is an off-road race that takes place in Mexico's Baja California Peninsula. The 2016 SCORE Baja 1000 is the final round of a four-race series, previous events are the SCORE Desert Challenge, the SCORE San Felipe 250 & the SCORE Baja 500. The 2016 round will be the 49th SCORE Baja 1000, occurring from November 16–20 over an 800-mile loop both starting and ending in Ensenada, Baja California, Mexico.