Counties in Colorado by uninsured rate, under 19 (US, ACS)

Custer County had the highest uninsured rate, under 19 (US, ACS) of 64 counties in 2023, at 18.1%. San Juan County had the lowest, at 0%. The median was 4.8% and the figure for Colorado was 5%. Source: the U.S. Census Bureau.

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Highest18.1Custer County
Median4.864 counties
Colorado5History

Map of counties, 2023

Adams County: 5.9 %Alamosa County: 1.5 %Arapahoe County: 6.4 %Archuleta County: 8.8 %Baca County: 3.4 %Bent County: 1.7 %Boulder County: 2 %Broomfield County: 3 %Chaffee County: 1.5 %Cheyenne County: 10.5 %Clear Creek County: 0 %Conejos County: 10.6 %Costilla County: 2.2 %Crowley County: 0.2 %Custer County: 18.1 %Delta County: 7.6 %Denver County: 5.3 %Dolores County: 5.2 %Douglas County: 2.9 %Eagle County: 5.2 %Elbert County: 3.1 %El Paso County: 4.7 %Fremont County: 3.3 %Garfield County: 14.5 %Gilpin County: 2.3 %Grand County: 6.4 %Gunnison County: 1 %Hinsdale County: 7.3 %Huerfano County: 1 %Jackson County: 7.5 %Jefferson County: 3.7 %Kiowa County: 1 %Kit Carson County: 10.4 %Lake County: 6.3 %La Plata County: 7.3 %Larimer County: 3.8 %Las Animas County: 2.8 %Lincoln County: 6.4 %Logan County: 4.6 %Mesa County: 6.1 %Mineral County: 12 %Moffat County: 4.9 %Montezuma County: 17.5 %Montrose County: 13.5 %Morgan County: 9.4 %Otero County: 2.7 %Ouray County: 6.4 %Park County: 3.3 %Phillips County: 2 %Pitkin County: 1 %Prowers County: 4.8 %Pueblo County: 2.4 %Rio Blanco County: 13.1 %Rio Grande County: 12.4 %Routt County: 7.4 %Saguache County: 8.4 %San Juan County: 0 %San Miguel County: 6.7 %Sedgwick County: 4.3 %Summit County: 2.8 %Teller County: 2.4 %Washington County: 6 %Weld County: 4.7 %Yuma County: 14.8 %
  • Under 2
  • 2 to 3.1
  • 3.1 to 4.8
  • 4.8 to 6.4
  • 6.4 to 9.9
  • 9.9 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

Custer County: 18.1 %Custer County18.1Montezuma County: 17.5 %Montezuma County17.5Yuma County: 14.8 %Yuma County14.8Garfield County: 14.5 %Garfield County14.5Montrose County: 13.5 %Montrose County13.5Rio Blanco County: 13.1 %Rio Blanco County13.1Rio Grande County: 12.4 %Rio Grande County12.4Mineral County: 12 %Mineral County12Conejos County: 10.6 %Conejos County10.6Cheyenne County: 10.5 %Cheyenne County10.5Kit Carson County: 10.4 %Kit Carson County10.4Morgan County: 9.4 %Morgan County9.4Archuleta County: 8.8 %Archuleta County8.8Saguache County: 8.4 %Saguache County8.4Delta County: 7.6 %Delta County7.6Jackson County: 7.5 %Jackson County7.5Routt County: 7.4 %Routt County7.4La Plata County: 7.3 %La Plata County7.3Hinsdale County: 7.3 %Hinsdale County7.3San Miguel County: 6.7 %San Miguel County6.7Lincoln County: 6.4 %Lincoln County6.4Arapahoe County: 6.4 %Arapahoe County6.4Grand County: 6.4 %Grand County6.4Ouray County: 6.4 %Ouray County6.4Lake County: 6.3 %Lake County6.3Mesa County: 6.1 %Mesa County6.1Washington County: 6 %Washington County6Adams County: 5.9 %Adams County5.9Denver County: 5.3 %Denver County5.3Eagle County: 5.2 %Eagle County5.2Dolores County: 5.2 %Dolores County5.2Moffat County: 4.9 %Moffat County4.9Prowers County: 4.8 %Prowers County4.8Weld County: 4.7 %Weld County4.7El Paso County: 4.7 %El Paso County4.7Logan County: 4.6 %Logan County4.6Sedgwick County: 4.3 %Sedgwick County4.3Larimer County: 3.8 %Larimer County3.8Jefferson County: 3.7 %Jefferson County3.7Baca County: 3.4 %Baca County3.4Custer County: 18.1 %Custer County18.1Montezuma County: 17.5 %Montezuma County17.5Yuma County: 14.8 %Yuma County14.8Garfield County: 14.5 %Garfield County14.5Montrose County: 13.5 %Montrose County13.5Rio Blanco County: 13.1 %Rio Blanco County13.1Rio Grande County: 12.4 %Rio Grande County12.4Mineral County: 12 %Mineral County12Conejos County: 10.6 %Conejos County10.6Cheyenne County: 10.5 %Cheyenne County10.5Kit Carson County: 10.4 %Kit Carson County10.4Morgan County: 9.4 %Morgan County9.4Archuleta County: 8.8 %Archuleta County8.8Saguache County: 8.4 %Saguache County8.4Delta County: 7.6 %Delta County7.6Jackson County: 7.5 %Jackson County7.5Routt County: 7.4 %Routt County7.4La Plata County: 7.3 %La Plata County7.3Hinsdale County: 7.3 %Hinsdale County7.3San Miguel County: 6.7 %San Miguel County6.7Lincoln County: 6.4 %Lincoln County6.4Arapahoe County: 6.4 %Arapahoe County6.4Grand County: 6.4 %Grand County6.4Ouray County: 6.4 %Ouray County6.4Lake County: 6.3 %Lake County6.3Mesa County: 6.1 %Mesa County6.1Washington County: 6 %Washington County6Adams County: 5.9 %Adams County5.9Denver County: 5.3 %Denver County5.3Eagle County: 5.2 %Eagle County5.2Dolores County: 5.2 %Dolores County5.2Moffat County: 4.9 %Moffat County4.9Prowers County: 4.8 %Prowers County4.8Weld County: 4.7 %Weld County4.7El Paso County: 4.7 %El Paso County4.7Logan County: 4.6 %Logan County4.6Sedgwick County: 4.3 %Sedgwick County4.3Larimer County: 3.8 %Larimer County3.8Jefferson County: 3.7 %Jefferson County3.7Baca County: 3.4 %Baca County3.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Custer County18.1-9.1 pts
2Montezuma County17.5+2.9 pts
3Yuma County14.8-0.9 pts
4Garfield County14.5+1.7 pts
5Montrose County13.50 pts
6Rio Blanco County13.1+2.4 pts
7Rio Grande County12.4+3.7 pts
8Mineral County12-1.7 pts
9Conejos County10.6-1.7 pts
10Cheyenne County10.5+1.3 pts
11Kit Carson County10.4-2 pts
12Morgan County9.4-1.6 pts
13Archuleta County8.8-1.1 pts
14Saguache County8.4+0.5 pts
15Delta County7.6-1 pts
16Jackson County7.5-1.8 pts
17Routt County7.4+0.6 pts
18La Plata County7.3+0.5 pts
19Hinsdale County7.3-0.7 pts
20San Miguel County6.7+1.8 pts
21Lincoln County6.4+1.4 pts
22Arapahoe County6.40 pts
22Grand County6.4+0.8 pts
24Ouray County6.4+0.3 pts
25Lake County6.3-4.2 pts
26Mesa County6.1-0.2 pts
27Washington County6+0.8 pts
28Adams County5.9+0.2 pts
29Denver County5.3-0.1 pts
30Eagle County5.2-0.7 pts
31Dolores County5.2-0.9 pts
32Moffat County4.9-1.1 pts
33Prowers County4.8+2.3 pts
34Weld County4.7-0.1 pts
35El Paso County4.7-0.4 pts
36Logan County4.6+1.5 pts
37Sedgwick County4.3+2.9 pts
38Larimer County3.8-0.6 pts
39Jefferson County3.7+0.1 pts
40Baca County3.4+1.8 pts
41Park County3.3-1 pts
42Fremont County3.3+0.1 pts
43Elbert County3.1+0.3 pts
44Broomfield County3-0.4 pts
45Douglas County2.9+0.1 pts
46Las Animas County2.8-0.3 pts
47Summit County2.8+0.5 pts
48Otero County2.7-1.6 pts
49Pueblo County2.4-0.1 pts
50Teller County2.4+0.7 pts
51Gilpin County2.3-0.7 pts
52Costilla County2.2+0.7 pts
53Phillips County2-5.3 pts
54Boulder County2-0.2 pts
55Bent County1.7-0.3 pts
56Chaffee County1.5-2.2 pts
57Alamosa County1.5-3.4 pts
58Gunnison County1+0.1 pts
59Pitkin County1-1.5 pts
60Huerfano County1-5.5 pts
61Kiowa County10 pts
62Crowley County0.20 pts
63Clear Creek County0-2.1 pts
63San Juan County00 pts

Other periods

About this ranking

People under 19 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population under 19. 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 under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-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 under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs (Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs, Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs. Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs, Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_colorado_by_2023,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs: Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs: Counties in Colorado by uninsured rate, under 19 (US, ACS), 2023
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-19-acs/colorado-counties?period=2023.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Retrieved 2026-10-12.
ER  - 
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Rank Counties in Colorado by uninsured rate, under 19 (US, ACS) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, under 19 (US, ACS)?

Custer County, with 18.1% in 2023, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 19 (US, ACS)?

San Juan County, with 0% in 2023.

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 under 19 with no health insurance coverage as a percentage of the civilian noninstitutionalized population under 19, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, under 19 (US, ACS): other rankings

Counties in Colorado: more rankings