Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in Colorado

Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS)

San Juan County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 64 counties in 2021, at 24.8%. Douglas County had the lowest, at 3.6%. The median was 11.9% and the figure for Colorado was 9.4%. Source: the U.S. Census Bureau.

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Highest24.8San Juan County
Lowest3.6Douglas County
Median11.964 counties
Colorado9.4History

Map of counties, 2021

Adams County: 13 %Alamosa County: 9 %Arapahoe County: 8.9 %Archuleta County: 17.1 %Baca County: 11.9 %Bent County: 8.1 %Boulder County: 5.8 %Broomfield County: 5.6 %Chaffee County: 11.5 %Cheyenne County: 11.6 %Clear Creek County: 8.6 %Conejos County: 21 %Costilla County: 14.4 %Crowley County: 13.5 %Custer County: 15.4 %Delta County: 16.9 %Denver County: 11.9 %Dolores County: 11.9 %Douglas County: 3.6 %Eagle County: 12.3 %Elbert County: 6.8 %El Paso County: 8.3 %Fremont County: 8.8 %Garfield County: 21.4 %Gilpin County: 7.9 %Grand County: 16.6 %Gunnison County: 11.1 %Hinsdale County: 22.5 %Huerfano County: 10.7 %Jackson County: 10.4 %Jefferson County: 6.2 %Kiowa County: 7.3 %Kit Carson County: 11.7 %Lake County: 22.5 %La Plata County: 12.5 %Larimer County: 6.9 %Las Animas County: 14.6 %Lincoln County: 9.2 %Logan County: 11 %Mesa County: 13.3 %Mineral County: 12.3 %Moffat County: 16.1 %Montezuma County: 12.6 %Montrose County: 17 %Morgan County: 13.1 %Otero County: 9.9 %Ouray County: 19 %Park County: 10 %Phillips County: 16.2 %Pitkin County: 8.1 %Prowers County: 19.5 %Pueblo County: 8.4 %Rio Blanco County: 14.6 %Rio Grande County: 20.6 %Routt County: 7.3 %Saguache County: 13.8 %San Juan County: 24.8 %San Miguel County: 10.3 %Sedgwick County: 17.9 %Summit County: 14.6 %Teller County: 12.7 %Washington County: 6.4 %Weld County: 10.9 %Yuma County: 18.2 %
  • Under 8.1
  • 8.1 to 10
  • 10 to 12
  • 12 to 14
  • 14 to 17
  • 17 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

San Juan County: 24.8 %San Juan County24.8Hinsdale County: 22.5 %Hinsdale County22.5Lake County: 22.5 %Lake County22.5Garfield County: 21.4 %Garfield County21.4Conejos County: 21 %Conejos County21Rio Grande County: 20.6 %Rio Grande County20.6Prowers County: 19.5 %Prowers County19.5Ouray County: 19 %Ouray County19Yuma County: 18.2 %Yuma County18.2Sedgwick County: 17.9 %Sedgwick County17.9Archuleta County: 17.1 %Archuleta County17.1Montrose County: 17 %Montrose County17Delta County: 16.9 %Delta County16.9Grand County: 16.6 %Grand County16.6Phillips County: 16.2 %Phillips County16.2Moffat County: 16.1 %Moffat County16.1Custer County: 15.4 %Custer County15.4Rio Blanco County: 14.6 %Rio Blanco County14.6Las Animas County: 14.6 %Las Animas County14.6Summit County: 14.6 %Summit County14.6Costilla County: 14.4 %Costilla County14.4Saguache County: 13.8 %Saguache County13.8Crowley County: 13.5 %Crowley County13.5Mesa County: 13.3 %Mesa County13.3Morgan County: 13.1 %Morgan County13.1Adams County: 13 %Adams County13Teller County: 12.7 %Teller County12.7Montezuma County: 12.6 %Montezuma County12.6La Plata County: 12.5 %La Plata County12.5Eagle County: 12.3 %Eagle County12.3Mineral County: 12.3 %Mineral County12.3Denver County: 11.9 %Denver County11.9Baca County: 11.9 %Baca County11.9Dolores County: 11.9 %Dolores County11.9Kit Carson County: 11.7 %Kit Carson County11.7Cheyenne County: 11.6 %Cheyenne County11.6Chaffee County: 11.5 %Chaffee County11.5Gunnison County: 11.1 %Gunnison County11.1Logan County: 11 %Logan County11Weld County: 10.9 %Weld County10.9San Juan County: 24.8 %San Juan County24.8Hinsdale County: 22.5 %Hinsdale County22.5Lake County: 22.5 %Lake County22.5Garfield County: 21.4 %Garfield County21.4Conejos County: 21 %Conejos County21Rio Grande County: 20.6 %Rio Grande County20.6Prowers County: 19.5 %Prowers County19.5Ouray County: 19 %Ouray County19Yuma County: 18.2 %Yuma County18.2Sedgwick County: 17.9 %Sedgwick County17.9Archuleta County: 17.1 %Archuleta County17.1Montrose County: 17 %Montrose County17Delta County: 16.9 %Delta County16.9Grand County: 16.6 %Grand County16.6Phillips County: 16.2 %Phillips County16.2Moffat County: 16.1 %Moffat County16.1Custer County: 15.4 %Custer County15.4Rio Blanco County: 14.6 %Rio Blanco County14.6Las Animas County: 14.6 %Las Animas County14.6Summit County: 14.6 %Summit County14.6Costilla County: 14.4 %Costilla County14.4Saguache County: 13.8 %Saguache County13.8Crowley County: 13.5 %Crowley County13.5Mesa County: 13.3 %Mesa County13.3Morgan County: 13.1 %Morgan County13.1Adams County: 13 %Adams County13Teller County: 12.7 %Teller County12.7Montezuma County: 12.6 %Montezuma County12.6La Plata County: 12.5 %La Plata County12.5Eagle County: 12.3 %Eagle County12.3Mineral County: 12.3 %Mineral County12.3Denver County: 11.9 %Denver County11.9Baca County: 11.9 %Baca County11.9Dolores County: 11.9 %Dolores County11.9Kit Carson County: 11.7 %Kit Carson County11.7Cheyenne County: 11.6 %Cheyenne County11.6Chaffee County: 11.5 %Chaffee County11.5Gunnison County: 11.1 %Gunnison County11.1Logan County: 11 %Logan County11Weld County: 10.9 %Weld County10.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1San Juan County24.8
2Hinsdale County22.5
3Lake County22.5
4Garfield County21.4
5Conejos County21
6Rio Grande County20.6
7Prowers County19.5
8Ouray County19
9Yuma County18.2
10Sedgwick County17.9
11Archuleta County17.1
12Montrose County17
13Delta County16.9
14Grand County16.6
15Phillips County16.2
16Moffat County16.1
17Custer County15.4
18Rio Blanco County14.6
19Las Animas County14.6
20Summit County14.6
21Costilla County14.4
22Saguache County13.8
23Crowley County13.5
24Mesa County13.3
25Morgan County13.1
26Adams County13
27Teller County12.7
28Montezuma County12.6
29La Plata County12.5
30Eagle County12.3
31Mineral County12.3
32Denver County11.9
33Baca County11.9
33Dolores County11.9
35Kit Carson County11.7
36Cheyenne County11.6
37Chaffee County11.5
38Gunnison County11.1
39Logan County11
40Weld County10.9
41Huerfano County10.7
42Jackson County10.4
43San Miguel County10.3
44Park County10
45Otero County9.9
46Lincoln County9.2
47Alamosa County9
48Arapahoe County8.9
49Fremont County8.8
50Clear Creek County8.6
51Pueblo County8.4
52El Paso County8.3
53Pitkin County8.1
54Bent County8.1
55Gilpin County7.9
56Kiowa County7.3
56Routt County7.3
58Larimer County6.9
59Elbert County6.8
60Washington County6.4
61Jefferson County6.2
62Boulder County5.8
63Broomfield County5.6
64Douglas County3.6

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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 B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.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 B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/colorado-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/colorado-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-35-64/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 B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/colorado-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS), 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-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-ages-35-64/colorado-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/colorado-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Colorado by uninsured rate, ages 35 to 64 (US, ACS) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, ages 35 to 64 (US, ACS)?

San Juan County, with 24.8% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Douglas County, with 3.6% 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 B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in Colorado: more rankings