Longmont, CO 80503 ZIP Code Profile

Related Place Profiles:
Longmont, CO | Niwot, CO

ZIP Code 80503: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Longmont, CO 80503

Acceptable Alternative
Niwot, CO 80503

  • ZIP Code Type: STANDARD
  • County: Boulder County
  • Centroid: Latitude 40.153, Longitude -105.171
  • Time Zone: Mountain Time Zone (UTC -7 hours)
  • Observes DST: Yes

ZIP Code 80503 has segments in 2 Counties (Boulder, Larimer).

  • Businesses Addresses: 305
  • PO Box Addresses: 0
  • Residential Addresses: 13,821
    • Multi-Family Addresses: 2,535
    • Single Family Addresses: 11,286

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


80503 ZIP Code Map

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Longmont, CO 80503 Data & Demographics (As of July 1, 2017)


Total Population 34,727
Daytime Population: Workers 11,830
Daytime Population: Residents 17,426
Total Daytime Population (TDP) 29,256
Ratio TDP/Total Population1 0.84
Population in Households 34,656
Population in Familes 28,638
Population in Group Qrtrs 71
Population Density2 353
Diversity Index3 36


Median Household Income $94,283
Average Household Income $122,735
Per Capita Income $49,252


Total Housing Units 14,268 (100%)
Owner Occupied HU 9,417 (66.0%)
Renter Occupied HU 4,497 (31.5%)
Vacant Housing Units 354 ( 2.5%)
Median Home Value $409,574
Average Home Value $509,430


Total Households 13,914
Average Household Size 2.49
Family Households 9,483
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.56% 1.42%
Households 1.41% 1.31%
Families 1.33% 1.25%
Median Household Income   2.26%
Per Capita Income   2.48%

Longmont, CO 80503 - Peer Comparisons by Rank and Percentile

The table below compares 80503 to the other 503 ZIP Codes in Colorado by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 48 91st
Population Density # 153 70th
Diversity Index # 259 49th
Median Household Income # 47 91st
Per Capita Income # 53 90th

Additional comparisons and rankings can be made with a VERY EASY TO USE Colorado Census Data Comparison Tool.

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