What are the Harmon, Louisiana Zip Codes for 2020, 2019Primary Zip Codes for HarmonZip CodePrimary CitySecondary City71019CoushattaHarmon, Armistead, Gahagan, East Point, Edgefield, Hanna, MartinCities sharing Zip Codes with HarmonZip CodePrimary CitySecondary CityMore Information71019CoushattaEast Point71019CoushattaEdgefield71019CoushattaHanna71019CoushattaHarmon71019CoushattaMartin71019CoushattaArmistead71019CoushattaGahaganAdvertisements