Counties in Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate)
Fremont County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 23 counties in 2021, at 25.1%. Johnson County had the lowest, at 11.9%. The median was 18.7% and the figure for Wyoming was 17%. Source: the U.S. Census Bureau.
Map of counties, 2021
- Under 16
- 16 to 18
- 18 to 19
- 19 to 20
- 20 and over
All counties, 2021
Full ranking
| Rank | Counties | 2021 (%) | Change on 2020 |
|---|---|---|---|
| 1 | Fremont County | 25.1 | +1 pts |
| 2 | Big Horn County | 23.3 | +3.4 pts |
| 3 | Niobrara County | 20.6 | -0.7 pts |
| 4 | Carbon County | 19.9 | -0.2 pts |
| 4 | Crook County | 19.9 | +2.2 pts |
| 6 | Washakie County | 19.7 | +1.1 pts |
| 7 | Lincoln County | 19.5 | +0.6 pts |
| 8 | Converse County | 19.3 | +3 pts |
| 9 | Goshen County | 19.1 | +1.6 pts |
| 10 | Hot Springs County | 19 | 0 pts |
| 10 | Platte County | 19 | +1.2 pts |
| 12 | Sublette County | 18.7 | +1.9 pts |
| 13 | Weston County | 18.3 | +3.1 pts |
| 14 | Sweetwater County | 17.7 | +1.3 pts |
| 15 | Sheridan County | 16.8 | +0.1 pts |
| 15 | Teton County | 16.8 | +0.7 pts |
| 15 | Uinta County | 16.8 | -0.2 pts |
| 18 | Campbell County | 16.7 | +1.4 pts |
| 19 | Natrona County | 16.3 | +0.1 pts |
| 20 | Park County | 14.4 | -2.1 pts |
| 21 | Albany County | 14.2 | 0 pts |
| 22 | Laramie County | 14.1 | -0.3 pts |
| 23 | Johnson County | 11.9 | -1.8 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-2021-csv.zip. Retrieved 2026-10-12.Citation styles
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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021. 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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021.
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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_wyoming_by_2021,
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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021}},
year = {2026},
howpublished = {Data set},
url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021. 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-2021-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 Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate), 2021
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-2021-csv.zip
L2 - https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wyoming-counties?period=2021.
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-2021-csv.zip. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Wyoming by uninsured rate, ages 18 to 64 (US model-based estimate) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_18_64","level":"province","within":"Wyoming","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate_18_64&level=province&within=Wyoming&limit=10Questions
Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?
Fremont County, with 25.1% in 2021, according to the U.S. Census Bureau.
Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?
Johnson County, with 11.9% 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, 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.