Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Colorado

Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate)

Saguache County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 64 counties in 2017, at 19.5%. Gilpin County had the lowest, at 4.5%. The median was 12.4% and the figure for Colorado was 10.2%. Source: the U.S. Census Bureau.

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Highest19.5Saguache County
Lowest4.5Gilpin County
Median12.464 counties
Colorado10.2History

Map of counties, 2017

Adams County: 13.8 %Alamosa County: 16 %Arapahoe County: 10.3 %Archuleta County: 14.3 %Baca County: 16 %Bent County: 12.4 %Boulder County: 7.7 %Broomfield County: 5.6 %Chaffee County: 11.2 %Cheyenne County: 15.8 %Clear Creek County: 5.8 %Conejos County: 12.8 %Costilla County: 17.5 %Crowley County: 12.9 %Custer County: 13.1 %Delta County: 12.7 %Denver County: 12.4 %Dolores County: 12.9 %Douglas County: 4.5 %Eagle County: 13.8 %Elbert County: 8.4 %El Paso County: 9.3 %Fremont County: 10.5 %Garfield County: 16.6 %Gilpin County: 4.5 %Grand County: 11.6 %Gunnison County: 11.7 %Hinsdale County: 11.3 %Huerfano County: 9 %Jackson County: 14.8 %Jefferson County: 7.8 %Kiowa County: 11.7 %Kit Carson County: 17 %Lake County: 13.8 %La Plata County: 12.8 %Larimer County: 8.4 %Las Animas County: 14.1 %Lincoln County: 10.3 %Logan County: 12.4 %Mesa County: 11.4 %Mineral County: 10.1 %Moffat County: 11.7 %Montezuma County: 15.6 %Montrose County: 14.6 %Morgan County: 14.9 %Otero County: 13.1 %Ouray County: 9.1 %Park County: 9.3 %Phillips County: 15.1 %Pitkin County: 12.7 %Prowers County: 17.5 %Pueblo County: 10 %Rio Blanco County: 10.2 %Rio Grande County: 16 %Routt County: 9.3 %Saguache County: 19.5 %San Juan County: 9.2 %San Miguel County: 12.4 %Sedgwick County: 13.1 %Summit County: 11.9 %Teller County: 8.9 %Washington County: 10.8 %Weld County: 11.3 %Yuma County: 15.5 %
  • Under 9.1
  • 9.1 to 11
  • 11 to 12
  • 12 to 13
  • 13 to 15
  • 15 and over
%, 2017. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Saguache County: 19.5 %Saguache County19.5Costilla County: 17.5 %Costilla County17.5Prowers County: 17.5 %Prowers County17.5Kit Carson County: 17 %Kit Carson County17Garfield County: 16.6 %Garfield County16.6Alamosa County: 16 %Alamosa County16Baca County: 16 %Baca County16Rio Grande County: 16 %Rio Grande County16Cheyenne County: 15.8 %Cheyenne County15.8Montezuma County: 15.6 %Montezuma County15.6Yuma County: 15.5 %Yuma County15.5Phillips County: 15.1 %Phillips County15.1Morgan County: 14.9 %Morgan County14.9Jackson County: 14.8 %Jackson County14.8Montrose County: 14.6 %Montrose County14.6Archuleta County: 14.3 %Archuleta County14.3Las Animas County: 14.1 %Las Animas County14.1Adams County: 13.8 %Adams County13.8Eagle County: 13.8 %Eagle County13.8Lake County: 13.8 %Lake County13.8Custer County: 13.1 %Custer County13.1Otero County: 13.1 %Otero County13.1Sedgwick County: 13.1 %Sedgwick County13.1Crowley County: 12.9 %Crowley County12.9Dolores County: 12.9 %Dolores County12.9Conejos County: 12.8 %Conejos County12.8La Plata County: 12.8 %La Plata County12.8Delta County: 12.7 %Delta County12.7Pitkin County: 12.7 %Pitkin County12.7Bent County: 12.4 %Bent County12.4Denver County: 12.4 %Denver County12.4Logan County: 12.4 %Logan County12.4San Miguel County: 12.4 %San Miguel County12.4Summit County: 11.9 %Summit County11.9Gunnison County: 11.7 %Gunnison County11.7Kiowa County: 11.7 %Kiowa County11.7Moffat County: 11.7 %Moffat County11.7Grand County: 11.6 %Grand County11.6Mesa County: 11.4 %Mesa County11.4Hinsdale County: 11.3 %Hinsdale County11.3Saguache County: 19.5 %Saguache County19.5Costilla County: 17.5 %Costilla County17.5Prowers County: 17.5 %Prowers County17.5Kit Carson County: 17 %Kit Carson County17Garfield County: 16.6 %Garfield County16.6Alamosa County: 16 %Alamosa County16Baca County: 16 %Baca County16Rio Grande County: 16 %Rio Grande County16Cheyenne County: 15.8 %Cheyenne County15.8Montezuma County: 15.6 %Montezuma County15.6Yuma County: 15.5 %Yuma County15.5Phillips County: 15.1 %Phillips County15.1Morgan County: 14.9 %Morgan County14.9Jackson County: 14.8 %Jackson County14.8Montrose County: 14.6 %Montrose County14.6Archuleta County: 14.3 %Archuleta County14.3Las Animas County: 14.1 %Las Animas County14.1Adams County: 13.8 %Adams County13.8Eagle County: 13.8 %Eagle County13.8Lake County: 13.8 %Lake County13.8Custer County: 13.1 %Custer County13.1Otero County: 13.1 %Otero County13.1Sedgwick County: 13.1 %Sedgwick County13.1Crowley County: 12.9 %Crowley County12.9Dolores County: 12.9 %Dolores County12.9Conejos County: 12.8 %Conejos County12.8La Plata County: 12.8 %La Plata County12.8Delta County: 12.7 %Delta County12.7Pitkin County: 12.7 %Pitkin County12.7Bent County: 12.4 %Bent County12.4Denver County: 12.4 %Denver County12.4Logan County: 12.4 %Logan County12.4San Miguel County: 12.4 %San Miguel County12.4Summit County: 11.9 %Summit County11.9Gunnison County: 11.7 %Gunnison County11.7Kiowa County: 11.7 %Kiowa County11.7Moffat County: 11.7 %Moffat County11.7Grand County: 11.6 %Grand County11.6Mesa County: 11.4 %Mesa County11.4Hinsdale County: 11.3 %Hinsdale County11.3
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Saguache County19.5-0.5 pts
2Costilla County17.50 pts
2Prowers County17.5+1.7 pts
4Kit Carson County17+1.6 pts
5Garfield County16.6-1.7 pts
6Alamosa County16+0.5 pts
6Baca County16+0.4 pts
6Rio Grande County16+1.6 pts
9Cheyenne County15.8+1.4 pts
10Montezuma County15.6-0.1 pts
11Yuma County15.5+1.2 pts
12Phillips County15.1+0.8 pts
13Morgan County14.9+0.3 pts
14Jackson County14.8-1.5 pts
15Montrose County14.6-0.1 pts
16Archuleta County14.3-0.9 pts
17Las Animas County14.1+2.3 pts
18Adams County13.8-1.1 pts
18Eagle County13.8-0.6 pts
18Lake County13.8-0.2 pts
21Custer County13.1+0.2 pts
21Otero County13.1+0.3 pts
21Sedgwick County13.1+0.4 pts
24Crowley County12.9+3.1 pts
24Dolores County12.9+0.5 pts
26Conejos County12.8+1.7 pts
26La Plata County12.8+1.2 pts
28Delta County12.7+0.7 pts
28Pitkin County12.7+0.1 pts
30Bent County12.4-2.8 pts
30Denver County12.4+0.1 pts
30Logan County12.4+0.2 pts
30San Miguel County12.4+0.3 pts
34Summit County11.9-0.3 pts
35Gunnison County11.7+0.3 pts
35Kiowa County11.7+0.4 pts
35Moffat County11.7+0.2 pts
38Grand County11.6+1.2 pts
39Mesa County11.4+0.3 pts
40Hinsdale County11.3-1.5 pts
40Weld County11.3+0.7 pts
42Chaffee County11.2+1.5 pts
43Washington County10.8-0.4 pts
44Fremont County10.5+0.5 pts
45Arapahoe County10.3+0.3 pts
45Lincoln County10.3-1.2 pts
47Rio Blanco County10.2-0.4 pts
48Mineral County10.1+0.9 pts
49Pueblo County10+0.5 pts
50El Paso County9.3+0.6 pts
50Park County9.3-1.7 pts
50Routt County9.3+0.1 pts
53San Juan County9.2-1.6 pts
54Ouray County9.1-0.7 pts
55Huerfano County9-1 pts
56Teller County8.9+0.4 pts
57Elbert County8.4+0.4 pts
57Larimer County8.4+0.1 pts
59Jefferson County7.80 pts
60Boulder County7.7-0.6 pts
61Clear Creek County5.8-0.8 pts
62Broomfield County5.6-0.4 pts
63Douglas County4.5+0.2 pts
63Gilpin County4.5-0.4 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

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. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. 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). Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_colorado_by_2017,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Colorado by uninsured rate, ages 18 to 64 (US model-based estimate), 2017
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/colorado-counties?period=2017.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Saguache County, with 19.5% in 2017, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Gilpin County, with 4.5% in 2017.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Colorado: more rankings