ZIP Code 80503 – Longmont, Colorado | ZipsCode.us
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ZIP Code 80503
Longmont, Colorado · Boulder
ZIP code 80503 belongs to the city of Longmont in Colorado (Boulder). See all Colorado ZIP Codes.
ZIP code 80503 belongs to Longmont, Colorado, in Boulder. If you are mailing a letter or package to this area, use Longmont, CO 80503 in the address. On this page you will find the city and county for 80503, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.
What City Is ZIP Code 80503?
The city for ZIP code 80503 is Longmont, Colorado. When you write an address in this area, the correct format is: Name, Street Address, Longmont, CO 80503.
ZIP Code 80503 County and State
ZIP code 80503 is located in Boulder, Colorado. For a complete list of cities and ZIP codes across the state, see the Colorado ZIP Codes page.
Nearby ZIP Codes in Boulder
These ZIP codes are in the same county as 80503:
ZIP Code 80503 on the Map
The map below shows the approximate center of ZIP code 80503, near Longmont, Colorado. You can zoom in and drag the map to explore the area.
Map center is approximate (ZIP area center, around 40.1559, -105.1624). Map data © OpenStreetMap.
Population and Demographics of ZIP Code 80503
According to public U.S. Census Bureau data, ZIP code 80503 is home to a community in Colorado. The figures below come from the U.S. Census and the American Community Survey (ACS).
Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.
Find an Address in ZIP Code 80503
Need the full ZIP+4 code for a specific street address in Longmont? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.
Frequently Asked Questions
What city is ZIP code 80503?
ZIP code 80503 is for Longmont, Colorado.
What county is ZIP code 80503 in?
ZIP code 80503 is in Boulder, Colorado.
What state is ZIP code 80503 in?
ZIP code 80503 is in Colorado (CO).
How do I find the ZIP+4 for an address in 80503?
Use the free ZIP+4 Lookup tool with the full street address to get the complete 9-digit ZIP code.
What are the nearby ZIP codes to 80503?
Nearby ZIP codes include 80020 (Broomfield), 80025 (Eldorado Springs), 80026 (Lafayette), 80027 (Louisville), 80038 (Broomfield).
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