10 Most Populated ZIP Codes in Colorado

The top ZIP code for population in Colorado is 80134 (Parker, Douglas County), with a population of 77,814. Across the top 10 most populated ZIP codes in Colorado, population ranges from 77,814 to 55,541, covering communities from Parker to Greeley.

Rank	ZIP	City	County	Population	Population
1	80134	Parker	Douglas County	77,814	77,814
2	80013	Aurora	Arapahoe County	74,732	74,732
3	80015	Centennial	Arapahoe County	72,155	72,155
4	80016	Centennial	Arapahoe County	66,479	66,479
5	80634	Greeley	Weld County	63,553	63,553
6	80504	Longmont	Weld County	61,305	61,305
7	80219	Denver	Denver County	60,095	60,095
8	80022	Commerce City	Adams County	59,556	59,556
9	80229	Denver	Adams County	57,274	57,274
10	80525	Fort Collins	Larimer County	55,541	55,541

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Colorado. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Colorado

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