What are the Northampton, New York Zip Codes for 2020, 2019Primary Zip Codes for NorthamptonZip CodePrimary CitySecondary City11901RiverheadNorthampton, FlandersCities sharing Zip Codes with NorthamptonZip CodePrimary CitySecondary CityMore Information11901RiverheadFlanders Flanders population stats 11901RiverheadNorthampton Northampton population stats Advertisements