Where is Zip Code 80504 map for 2020, 2019Primary Zip Codes for 80504Zip CodePrimary CitySecondary City80504LongmontLongmont, Niwot, Firestone, FrederickCities sharing Zip Codes with 80504Zip CodePrimary CitySecondary CityMore Information80503LongmontNiwot Niwot population stats 80504LongmontFirestone Firestone population stats 80504LongmontFrederick Frederick population stats 80504LongmontNiwot Niwot population stats 80516ErieFrederick Frederick population stats 80501LongmontLongmont Longmont population stats 80502LongmontLongmont Longmont population stats 80503LongmontLongmont Longmont population stats 80520FirestoneFirestone Firestone population stats 80530FrederickFrederick Frederick population stats 80544NiwotNiwot Niwot population stats Advertisements