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Denver-Aurora-Greeley, CO Combined Statistical Area Demographics

Denver-Aurora-Greeley, CO Combined Statistical Area is the 18th most populous of 184 combined statistical areas in the United States, with 3,623,560 residents across 13,056 square miles. That is about 278 people per square mile.

At the 2020 census

Population 3,623,560
Land area 13,056 sq mi
Density 278 / sq mi

Data: 2020 Census · American Community Survey 2024

How Denver-Aurora-Greeley, CO Combined Statistical Area compares to the US

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Central Location: Denver-Aurora-Greeley, CO Combined Statistical Area

Measured from the combined statistical area's main population center using 2020 census blocks.

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Counties in the Denver-Aurora-Greeley, CO Combined Statistical Area area

Name Population Sq mi Per sq mi
Denver County 715,509 153.1 4,674
County Arapahoe 655,097 798.1 821
County Jefferson 582,897 764.2 763
Adams County, CO 519,571 1,166.7 445
Douglas County, CO 357,978 840.2 426
Boulder County, CO 330,758 726.4 455
Weld County, CO 328,968 3,985.0 83
County Broomfield 74,125 33.0 2,244
County Elbert 26,062 1,850.8 14
County Park 17,390 2,193.8 8
Clear Creek County, CO 9,397 395.1 24
Gilpin County, CO 5,808 150.0 39

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About this page

This page shows demographics for a US combined statistical area from the 2020 census and the American Community Survey: population, land area, density, and how the region compares to national averages.

Combined areas are built from whole counties, listed below. Statistics aggregate the member counties' census tracts.

Read how BlockAtlas computes population within an area →