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ZIP Code Database - Facts & Stats

Data Last Updated: October 1, 2022

ZIP Codes for City of Longmont, CO

Longmont, CO Covers 4 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 80501StandardBoulder39,521720 / 303
ZIP Code 80502P.O. BoxBoulder0720 / 303
ZIP Code 80503StandardBoulder31,064720 / 303
ZIP Code 80504StandardWeld46,876720 / 303 / 970

Timezone(s):Mountain (GMT -07:00)
Counties:BOULDER, CO
Population:86,270 (More Details)
Male Population:42,496
Female Population:43,774
Median Age:37
ZIP Codes:4
Area Codes:3
Total Area:4,017 square miles (county)
Land Area:3,987 square miles (county)
Water Area:30 square miles (county)

Longmont, CO Demographic Information *

Total population86,270
Male population42,496
Female population43,774
Median age (years)36.6
White Population71,877
Black Population815
Indian Population859
Asian Population2,758
Hawaiian Population44
Hispanic Population21,191
Median age (Male)35.5
Median age (Female)37.9
Total households33,252
Family households (families)22,074
Average household size2.58
Average family size3.16
Total housing units35,008
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 10/1/2022],
  2. Internal Data Creation [Last Updated: 10/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],