Charenton is a census-designated place and town in St. Mary Parish, Louisiana, United States. The population was 1,944 at the 2000 census. According to legend, the town received its name from one of the earliest settlers of the region, Alexandre Frere. Frere, a native of Paris, France, reportedly exclaimed on his deathbed that 'anyone choosing to move to that part of Louisiana belonged in Charenton!' Charenton was the name of a notorious insane asylum outside of Paris. Charenton apartments for rent comparison page shows most up to date rent information on Charenton apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.