What are the Harwood Heights, Illinois Zip Codes for 2020, 2019Primary Zip Codes for Harwood HeightsZip CodePrimary CitySecondary City60656ChicagoHarwood Heights, Harwood Hts, Norridge60706Harwood HeightsHarwood Heights, Harwood Hts, Norridge, ChicagoCities sharing Zip Codes with Harwood HeightsZip CodePrimary CitySecondary CityMore Information60656ChicagoHarwood Heights60656ChicagoHarwood Hts60656ChicagoNorridge60706Harwood HeightsHarwood Hts60706Harwood HeightsNorridge60706Harwood HeightsChicago Chicago population stats Advertisements