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

Clark County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 44 counties in 2020, at 31.3%. Ada County had the lowest, at 8.7%. The median was 15.5% and the figure for Idaho was 13.4%. Source: the U.S. Census Bureau.

Highest31.3Clark County

Lowest8.7Ada County

Median15.544 counties

Idaho13.4History

Map of counties, 2020

Under 13
13 to 14
14 to 15
15 to 17
17 to 20
20 and over

%, 2020. 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.

All counties, 2020

%. 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

Rank	Counties	2020 (%)	Change on 2019
1	Clark County	31.3	-4 pts
2	Jerome County	23.9	-4.1 pts
3	Gooding County	23.5	-2.2 pts
4	Owyhee County	22.3	-6.8 pts
5	Minidoka County	21.8	-1.7 pts
6	Power County	21.5	-2.7 pts
7	Lincoln County	21	-4.4 pts
8	Fremont County	20.2	-1.2 pts
9	Teton County	18.3	-0.4 pts
10	Boundary County	18.2	-2.5 pts
11	Cassia County	18.1	-4.7 pts
12	Blaine County	17.9	-4.5 pts
13	Benewah County	17.2	-1.4 pts
14	Payette County	17.1	-3.6 pts
15	Washington County	17	-4.5 pts
16	Lewis County	16.9	-2.2 pts
17	Canyon County	16.4	-3.6 pts
17	Idaho County	16.4	-3.3 pts
19	Gem County	16.3	-2 pts
20	Twin Falls County	16.1	-2.4 pts
21	Bingham County	15.8	-3.5 pts
22	Franklin County	15.5	-2.1 pts
23	Adams County	15.4	-3.9 pts
23	Elmore County	15.4	-3.7 pts
25	Shoshone County	15.2	-2.4 pts
26	Jefferson County	15	-3.3 pts
27	Custer County	14.7	-2.6 pts
28	Bonner County	14.4	-1.7 pts
29	Camas County	14	+0.4 pts
29	Lemhi County	14	-2.4 pts
31	Kootenai County	13.4	-2.1 pts
32	Bonneville County	13.3	-1.1 pts
32	Valley County	13.3	-2.6 pts
34	Boise County	12.9	-1 pts
35	Clearwater County	12.8	-4.5 pts
36	Nez Perce County	12.7	-2 pts
37	Bear Lake County	12.6	-1.3 pts
38	Bannock County	12.5	-3.1 pts
39	Caribou County	12.2	-1.3 pts
39	Latah County	12.2	-0.6 pts
41	Oneida County	12	-4.4 pts
42	Butte County	11.7	-1.3 pts
43	Madison County	11.1	-0.7 pts
44	Ada County	8.7	-3.1 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-2020-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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020. 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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020.

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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_idaho_by_2020,
  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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020. 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-2020-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 Idaho by uninsured rate, ages 18 to 64 (US model-based estimate), 2020
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-2020-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/idaho-counties?period=2020.
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-2020-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)?

Clark County, with 31.3% in 2020, according to the U.S. Census Bureau.

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

Ada County, with 8.7% in 2020.

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.