Zip Code 80503
Longmont, Colorado — Boulder County
📍 ZIP code 80503 is in Longmont, Boulder County, Colorado.
ZIP code 80503 is located in Longmont, Boulder County, Colorado. It is a zip code in the Mountain (MST/MDT) Time Zone with an estimated population of 36,206. The area code for ZIP code 80503 is 719.
Quick Answer
Zip code 80503 is in Longmont, Colorado (Boulder County). It has a population of 36,206, median household income of $118,465, and median home value of $704,800.
Population
36,206
Income
$118,465
Home Value
$704,800
Climate
91°F / 14°F
About Zip Code 80503
Zip code 80503 is located in Longmont, Colorado, within Boulder County. Home to approximately 36,206 residents, this area sits at an elevation of 5186 ft and falls within the Mountain (MST/MDT) timezone. The local area code is 719.
The median household income is $118,465 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $704,800, and the cost of living index is 202 (102% above the national average of 100).
Summers average a high of 91°F while winters drop to 14°F. The area receives about 15 in of rain and 68 in of snow annually. The zip code covers 91.1 square miles of land area and 3.1 square miles of water.
Key Statistics
36,206
$118,465
$704,800
Mountain (MST/MDT)
719
5186 ft
91.1 sq mi
43.9
15,508
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Compare With Nearby Zip Codes
| Metric | 80503 | 80501 | 80301 | 80540 | 80504 | 80304 |
|---|---|---|---|---|---|---|
| City | Longmont, CO | Longmont, CO | Boulder, CO | Lyons, CO | Longmont, CO | Boulder, CO |
| Population | 36,206 | 43,591 | 25,252 | 4,620 | 61,305 | 25,634 |
| Median Income | $118,465 | $77,705 | $92,974 | $136,109 | $109,671 | $121,534 |
| Home Value | $704,800 | $461,400 | $761,500 | $787,800 | $556,500 | $1,166,100 |
| Cost of Living | 202 | 134 | 196 | 227 | 164 | 250 |
| Median Age | 43.9 | 38 | 37.4 | 47.2 | 40.2 | 41.5 |
Cost of Living
100 = National Average. Longmont's cost of living is 102% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
5.9x
Demographics
Zip code 80503 has a population of 36,206 people with a median age of 43.9. There are 15,508 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Longmont (80503) population trend from 2010 to 2024
↑ 8.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
91°F
14°F
15 in
68 in
Longmont experiences hot summers with average highs around 91°F. Winters are cold with lows averaging 14°F. With 68 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$704,800
Median Household Income
$118,465
With 15,508 housing units across 91.1 square miles, 80503 has a housing density of 170 units per square mile. The home price-to-income ratio is 5.9x.
Location & Geography
Latitude
40.1690°
Longitude
-105.2104°
Land Area
91.1 sq mi
Water Area
3.1 sq mi
Nearby Zip Codes
Zip codes closest to 80503 (Longmont, CO) with distances:
All Zip Codes in Longmont, CO
Other zip codes serving Longmont:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 80503's $118,465. A way to compare Longmont to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 80503 (Longmont, CO). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Longmont, Colorado?
Longmont, Colorado uses zip code 80503 along with 2 other zip codes.
What county is zip code 80503 in?
Zip code 80503 is located in Boulder County, Colorado.
What is the population of zip code 80503?
The population of zip code 80503 is 36,206 with a median age of 43.9.
Is 80503 in Longmont, Colorado?
Yes, zip code 80503 is in Longmont, Boulder County, Colorado. The area code is 719.
Frequently Asked Questions
What city is zip code 80503 in?
Zip code 80503 is in Longmont, Colorado. It is part of Boulder County and uses the Mountain (MST/MDT) timezone.
What is zip code 80503?
Zip code 80503 is a U.S. postal code in Longmont, Colorado (Boulder County). It has a population of 36,206 and covers 91.1 square miles.
What is the population of zip code 80503?
The population of zip code 80503 (Longmont, CO) is 36,206 with a median age of 43.9. There are approximately 15,508 housing units in this area.
What is the median income in zip code 80503?
The median household income in zip code 80503 (Longmont, CO) is $118,465 per year. The cost of living index is 202 (100 = national average).
What is the average home price in zip code 80503?
The median home value in zip code 80503 (Longmont, CO) is $704,800. The cost of living index is 202 compared to the national average of 100.
What county is zip code 80503 in?
Zip code 80503 is located in Boulder County, Colorado. The primary city is Longmont.
What is the area code for zip code 80503?
Zip code 80503 in Longmont, CO uses area code 719. It is located in the Mountain (MST/MDT) timezone.
Is zip code 80503 a good place to live?
Zip code 80503 (Longmont, CO) has a cost of living index of 202 (100 = national average), a median household income of $118,465, and median home values of $704,800. The median age is 43.9. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 80503?
The cost of living index for zip code 80503 (Longmont, CO) is 202, where 100 represents the national average. This area is above the national average. Median home value: $704,800.
What schools serve zip code 80503?
Zip code 80503 in Longmont, Colorado is served by the local school district of Boulder County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.