Data / Rankings / Population density / Counties in Colorado

Counties in Colorado by population density, 2025

Denver County had the highest population density of 64 counties in 2025, at 1,868.1 inhabitants per km². Hinsdale County had the lowest, at 0.3 inhabitants per km². The median was 4.2 inhabitants per km² and the figure for Colorado was 22.4 inhabitants per km². Source: the U.S. Census Bureau.

Highest1,868.1Denver County
Lowest0.3Hinsdale County
Median4.264 counties
Colorado22.4History

Top 40 counties, 2025

CSVChart (SVG)

Denver CountyDenver County: 1,868.1 inhabitants per km²1,868.1Broomfield CountyBroomfield County: 927.3 inhabitants per km²927.3Arapahoe CountyArapahoe County: 326.1 inhabitants per km²326.1Jefferson CountyJefferson County: 293.2 inhabitants per km²293.2Douglas CountyDouglas County: 183.6 inhabitants per km²183.6Adams CountyAdams County: 183.5 inhabitants per km²183.5Boulder CountyBoulder County: 174.6 inhabitants per km²174.6El Paso CountyEl Paso County: 137.5 inhabitants per km²137.5Larimer CountyLarimer County: 56.1 inhabitants per km²56.1Weld CountyWeld County: 36.7 inhabitants per km²36.7Pueblo CountyPueblo County: 27.4 inhabitants per km²27.4Summit CountySummit County: 20 inhabitants per km²20Mesa CountyMesa County: 18.9 inhabitants per km²18.9Teller CountyTeller County: 17.2 inhabitants per km²17.2Gilpin CountyGilpin County: 15.6 inhabitants per km²15.6La Plata CountyLa Plata County: 13 inhabitants per km²13Fremont CountyFremont County: 12.6 inhabitants per km²12.6Eagle CountyEagle County: 12.4 inhabitants per km²12.4Delta CountyDelta County: 10.9 inhabitants per km²10.9Morgan CountyMorgan County: 9.1 inhabitants per km²9.1Alamosa CountyAlamosa County: 8.9 inhabitants per km²8.9Clear Creek CountyClear Creek County: 8.8 inhabitants per km²8.8Garfield CountyGarfield County: 8.3 inhabitants per km²8.3Chaffee CountyChaffee County: 7.9 inhabitants per km²7.9Lake CountyLake County: 7.7 inhabitants per km²7.7Montrose CountyMontrose County: 7.7 inhabitants per km²7.7Pitkin CountyPitkin County: 6.6 inhabitants per km²6.6Elbert CountyElbert County: 6.4 inhabitants per km²6.4Otero CountyOtero County: 5.4 inhabitants per km²5.4Montezuma CountyMontezuma County: 5.1 inhabitants per km²5.1Rio Grande CountyRio Grande County: 4.7 inhabitants per km²4.7Logan CountyLogan County: 4.3 inhabitants per km²4.3Routt CountyRoutt County: 4.1 inhabitants per km²4.1Archuleta CountyArchuleta County: 4.1 inhabitants per km²4.1Ouray CountyOuray County: 3.8 inhabitants per km²3.8Grand CountyGrand County: 3.4 inhabitants per km²3.4Park CountyPark County: 3.2 inhabitants per km²3.2Custer CountyCuster County: 2.9 inhabitants per km²2.9Prowers CountyProwers County: 2.8 inhabitants per km²2.8Crowley CountyCrowley County: 2.8 inhabitants per km²2.8
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1Denver County1,868.1-0.1%
2Broomfield County927.3+1%
3Arapahoe County326.1-0.3%
4Jefferson County293.20%
5Douglas County183.6+1.6%
6Adams County183.5+1%
7Boulder County174.6-0.3%
8El Paso County137.5+0.6%
9Larimer County56.1+0.8%
10Weld County36.7+1.9%
11Pueblo County27.4-0.5%
12Summit County20-0.4%
13Mesa County18.9+0.9%
14Teller County17.2+0.1%
15Gilpin County15.6+2%
16La Plata County13-0.1%
17Fremont County12.6+0.1%
18Eagle County12.4-0.6%
19Delta County10.9-0.4%
20Morgan County9.1-0%
21Alamosa County8.9-0%
22Clear Creek County8.8-0.3%
23Garfield County8.3-0.5%
24Chaffee County7.9+0.2%
25Lake County7.7+1.1%
26Montrose County7.7-0.2%
27Pitkin County6.6-0.8%
28Elbert County6.4+4.1%
29Otero County5.4-1.2%
30Montezuma County5.1-0.1%
31Rio Grande County4.7-0.5%
32Logan County4.3-0.2%
33Routt County4.1-0.6%
34Archuleta County4.1+1.2%
35Ouray County3.8+1.8%
36Grand County3.4+1.3%
37Park County3.2-0.2%
38Custer County2.9+0.4%
39Prowers County2.8-0.1%
40Crowley County2.8+0.5%
41Phillips County2.5-0.8%
42San Miguel County2.3-0.9%
43Conejos County2.3+0.1%
44Gunnison County2.1+0.2%
45Huerfano County1.7+0.2%
46Yuma County1.6+0.2%
47Sedgwick County1.6-1.1%
48Bent County1.5-0.5%
49Kit Carson County1.3+0.6%
50Las Animas County1.2-0.9%
51Costilla County1.2+0.2%
52Moffat County1.1-1.4%
53Dolores County0.9+0.6%
54Lincoln County0.8+0.8%
55Saguache County0.8+0.6%
56San Juan County0.8-1%
57Rio Blanco County0.8-1.6%
58Washington County0.7-0.3%
59Baca County0.5-1.2%
60Mineral County0.4-1.5%
61Cheyenne County0.4+1.4%
62Kiowa County0.3+0.7%
63Jackson County0.3-5.2%
64Hinsdale County0.30%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Rank Counties in Colorado by population density using official data, and cite the source.
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Questions

Which county has the highest population density?

Denver County, with 1,868.1 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Hinsdale County, with 0.3 inhabitants per km² in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Colorado: more rankings