The community was founded "circa" 1830 and named for the Mission (then known as San Antonio de Béxar) which was the location of the Battle of the Alamo, scene of one of the bloodiest battles fought on North American soil. Bexar first appeared on the Alabama state map in 1853. The major road through Bexar was U.S. Route 78, connecting Birmingham and Memphis, Tennessee. However, the road was improved and rerouted about one mile north of Bexar in the 1960s. All that remains today in Bexar are homes, a few churches and the vacant buildings that once housed the post office and general store.