Belle Fontaine (; ) is an unincorporated community and census-designated place (CDP) in Mobile County, Alabama, United States, on the western shore of Mobile Bay. It is located south of the city of Mobile, along the stretch of shore between the Deer River and the Fowl River. As of the 2020 census, its population was 613.
The Belle Fontaine shoreline experiences the occasional jubilee, a rare phenomenon in which fish and crustaceans swarm in the water, just off the beach.
Belle Fontaine was listed as a census designated place in the 2010 U.S. census.