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is a census-designated place (CDP) in Calcasieu Parish, Louisiana, United States. The population was 10,535 at the 2000 census. Located just north of the city of Lake Charles, it is considered a suburb of that city. Moss Bluff is a burgeoning community, one of the few populations in Calcasieu Parish experiencing growth.
According to the United States Census Bureau, the CDP has a total area of 15.8 square miles (41.0 km²), of which, 15.2 square miles (39.4 km²) of it is land and 0.6 square miles (1.6 km²) of it (3.98%) is water.
Moss Bluff is intersected by Louisiana Highway 171 and Louisiana Highway 378.