Caujac () is a commune in the Haute-Garonne department in southwestern France.
The commune is bordered by five other communes: Auterive to the north, Grazac to the northwest, Esperce to the west, Cintegabelle to the east, and finally by Gaillac-Toulza to the south.
During the World War II, Caujac was captured by Nazi Germany until the Allied Powers arrived cir. 1944 - 1945.