Data / Rankings / Households / Counties in Colorado

Counties in Colorado by households

Denver County had the highest households of 64 counties in 2021, at 313,926. San Juan County had the lowest, at 326. The median was 6,084 and the figure for Colorado was 2.23 million. Source: the U.S. Census Bureau.

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Highest313,926Denver County
Lowest326San Juan County
Median6,08464 counties
Colorado2,227,932History

Map of counties, 2021

Adams County: 176,880 countAlamosa County: 6,327 countArapahoe County: 247,251 countArchuleta County: 5,770 countBaca County: 1,594 countBent County: 1,805 countBoulder County: 131,701 countBroomfield County: 29,487 countChaffee County: 8,539 countCheyenne County: 695 countClear Creek County: 4,427 countConejos County: 3,097 countCostilla County: 1,446 countCrowley County: 1,340 countCuster County: 2,124 countDelta County: 12,143 countDenver County: 313,926 countDolores County: 1,144 countDouglas County: 127,921 countEagle County: 19,511 countElbert County: 9,261 countEl Paso County: 270,178 countFremont County: 17,510 countGarfield County: 21,707 countGilpin County: 2,791 countGrand County: 5,841 countGunnison County: 7,100 countHinsdale County: 442 countHuerfano County: 2,744 countJackson County: 632 countJefferson County: 236,499 countKiowa County: 584 countKit Carson County: 2,964 countLake County: 2,795 countLa Plata County: 22,266 countLarimer County: 145,175 countLas Animas County: 6,410 countLincoln County: 1,812 countLogan County: 7,928 countMesa County: 61,977 countMineral County: 386 countMoffat County: 5,121 countMontezuma County: 10,461 countMontrose County: 16,840 countMorgan County: 10,601 countOtero County: 7,618 countOuray County: 2,204 countPark County: 7,169 countPhillips County: 1,715 countPitkin County: 7,202 countProwers County: 4,421 countPueblo County: 66,442 countRio Blanco County: 2,488 countRio Grande County: 4,616 countRoutt County: 10,094 countSaguache County: 2,877 countSan Juan County: 326 countSan Miguel County: 3,594 countSedgwick County: 1,020 countSummit County: 11,329 countTeller County: 10,557 countWashington County: 2,001 countWeld County: 111,222 countYuma County: 3,884 count
  • Under 2,000
  • 2,000 to 3,000
  • 3,000 to 6,000
  • 6,000 to 10K
  • 10K to 46K
  • 46K and over
count, 2021. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Denver County: 313,926 countDenver County313,926El Paso County: 270,178 countEl Paso County270,178Arapahoe County: 247,251 countArapahoe County247,251Jefferson County: 236,499 countJefferson County236,499Adams County: 176,880 countAdams County176,880Larimer County: 145,175 countLarimer County145,175Boulder County: 131,701 countBoulder County131,701Douglas County: 127,921 countDouglas County127,921Weld County: 111,222 countWeld County111,222Pueblo County: 66,442 countPueblo County66,442Mesa County: 61,977 countMesa County61,977Broomfield County: 29,487 countBroomfield County29,487La Plata County: 22,266 countLa Plata County22,266Garfield County: 21,707 countGarfield County21,707Eagle County: 19,511 countEagle County19,511Fremont County: 17,510 countFremont County17,510Montrose County: 16,840 countMontrose County16,840Delta County: 12,143 countDelta County12,143Summit County: 11,329 countSummit County11,329Morgan County: 10,601 countMorgan County10,601Teller County: 10,557 countTeller County10,557Montezuma County: 10,461 countMontezuma County10,461Routt County: 10,094 countRoutt County10,094Elbert County: 9,261 countElbert County9,261Chaffee County: 8,539 countChaffee County8,539Logan County: 7,928 countLogan County7,928Otero County: 7,618 countOtero County7,618Pitkin County: 7,202 countPitkin County7,202Park County: 7,169 countPark County7,169Gunnison County: 7,100 countGunnison County7,100Las Animas County: 6,410 countLas Animas County6,410Alamosa County: 6,327 countAlamosa County6,327Grand County: 5,841 countGrand County5,841Archuleta County: 5,770 countArchuleta County5,770Moffat County: 5,121 countMoffat County5,121Rio Grande County: 4,616 countRio Grande County4,616Clear Creek County: 4,427 countClear Creek County4,427Prowers County: 4,421 countProwers County4,421Yuma County: 3,884 countYuma County3,884San Miguel County: 3,594 countSan Miguel County3,594Denver County: 313,926 countDenver County313,926El Paso County: 270,178 countEl Paso County270,178Arapahoe County: 247,251 countArapahoe County247,251Jefferson County: 236,499 countJefferson County236,499Adams County: 176,880 countAdams County176,880Larimer County: 145,175 countLarimer County145,175Boulder County: 131,701 countBoulder County131,701Douglas County: 127,921 countDouglas County127,921Weld County: 111,222 countWeld County111,222Pueblo County: 66,442 countPueblo County66,442Mesa County: 61,977 countMesa County61,977Broomfield County: 29,487 countBroomfield County29,487La Plata County: 22,266 countLa Plata County22,266Garfield County: 21,707 countGarfield County21,707Eagle County: 19,511 countEagle County19,511Fremont County: 17,510 countFremont County17,510Montrose County: 16,840 countMontrose County16,840Delta County: 12,143 countDelta County12,143Summit County: 11,329 countSummit County11,329Morgan County: 10,601 countMorgan County10,601Teller County: 10,557 countTeller County10,557Montezuma County: 10,461 countMontezuma County10,461Routt County: 10,094 countRoutt County10,094Elbert County: 9,261 countElbert County9,261Chaffee County: 8,539 countChaffee County8,539Logan County: 7,928 countLogan County7,928Otero County: 7,618 countOtero County7,618Pitkin County: 7,202 countPitkin County7,202Park County: 7,169 countPark County7,169Gunnison County: 7,100 countGunnison County7,100Las Animas County: 6,410 countLas Animas County6,410Alamosa County: 6,327 countAlamosa County6,327Grand County: 5,841 countGrand County5,841Archuleta County: 5,770 countArchuleta County5,770Moffat County: 5,121 countMoffat County5,121Rio Grande County: 4,616 countRio Grande County4,616Clear Creek County: 4,427 countClear Creek County4,427Prowers County: 4,421 countProwers County4,421Yuma County: 3,884 countYuma County3,884San Miguel County: 3,594 countSan Miguel County3,594
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Full ranking

RankCounties2021
count
1Denver County313,926
2El Paso County270,178
3Arapahoe County247,251
4Jefferson County236,499
5Adams County176,880
6Larimer County145,175
7Boulder County131,701
8Douglas County127,921
9Weld County111,222
10Pueblo County66,442
11Mesa County61,977
12Broomfield County29,487
13La Plata County22,266
14Garfield County21,707
15Eagle County19,511
16Fremont County17,510
17Montrose County16,840
18Delta County12,143
19Summit County11,329
20Morgan County10,601
21Teller County10,557
22Montezuma County10,461
23Routt County10,094
24Elbert County9,261
25Chaffee County8,539
26Logan County7,928
27Otero County7,618
28Pitkin County7,202
29Park County7,169
30Gunnison County7,100
31Las Animas County6,410
32Alamosa County6,327
33Grand County5,841
34Archuleta County5,770
35Moffat County5,121
36Rio Grande County4,616
37Clear Creek County4,427
38Prowers County4,421
39Yuma County3,884
40San Miguel County3,594
41Conejos County3,097
42Kit Carson County2,964
43Saguache County2,877
44Lake County2,795
45Gilpin County2,791
46Huerfano County2,744
47Rio Blanco County2,488
48Ouray County2,204
49Custer County2,124
50Washington County2,001
51Lincoln County1,812
52Bent County1,805
53Phillips County1,715
54Baca County1,594
55Costilla County1,446
56Crowley County1,340
57Dolores County1,144
58Sedgwick County1,020
59Cheyenne County695
60Jackson County632
61Kiowa County584
62Hinsdale County442
63Mineral County386
64San Juan County326

Other periods

About this ranking

Number of households, which equals the number of occupied housing units. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

People living in group quarters, such as college dormitories, nursing homes and prisons, are not in households.

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. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25003: occupied housing units (households) (Counties in Colorado by households, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Colorado by households, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Invokely, https://invokely.ai/rankings/households/colorado-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Counties in Colorado by households, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Also distributed by Invokely, https://invokely.ai/rankings/households/colorado-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Colorado by households, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat, via Invokely: https://invokely.ai/rankings/households/colorado-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_colorado_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Colorado by households, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/households/colorado-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Colorado by households, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat
L2  - https://invokely.ai/rankings/households/colorado-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/households/colorado-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest households?

Denver County, with 313,926 in 2021, according to the U.S. Census Bureau.

Which county has the lowest households?

San Juan County, with 326 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Households: other rankings

Counties in Colorado: more rankings