Morgan City, LA is located in both St. Martin Parish and St. Mary Parish. The 2010 census reported Morgan City as having a population of 12,404. The city has an elevation of 7ft. Morgan City’s area code is 985, and zip code is 70380. We currently offer mobile homes to Morgan City, LA. Manufactured Homes including single wides, double wides and modular all can be done as a custom design just for you. Evangeline Home Center has quality homes and affordable prices for today’s best built mobile homes in Morgan City, LA.