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

Counties in Wisconsin 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 72 counties in 2018, at 15.7%. Waukesha County had the lowest, at 4.3%. The median was 8.1% and the figure for Wisconsin was 7.5%. Source: the U.S. Census Bureau.

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Highest15.7Clark County
Lowest4.3Waukesha County
Median8.172 counties
Wisconsin7.5History

Map of counties, 2018

Adams County: 9.3 %Ashland County: 9.6 %Barron County: 8.6 %Bayfield County: 9.9 %Brown County: 8.4 %Buffalo County: 8.6 %Burnett County: 9.8 %Calumet County: 5.1 %Chippewa County: 7.2 %Clark County: 15.7 %Columbia County: 6.7 %Crawford County: 8 %Dane County: 5.7 %Dodge County: 6.7 %Door County: 7.8 %Douglas County: 7.4 %Dunn County: 6.7 %Eau Claire County: 6.9 %Florence County: 8.8 %Fond du Lac County: 6.4 %Forest County: 12.1 %Grant County: 9 %Green County: 6 %Green Lake County: 10.3 %Iowa County: 5.9 %Iron County: 8.8 %Jackson County: 11.1 %Jefferson County: 7.6 %Juneau County: 9.1 %Kenosha County: 8.3 %Kewaunee County: 7.2 %La Crosse County: 5.4 %Lafayette County: 11.8 %Langlade County: 8.1 %Lincoln County: 6.4 %Manitowoc County: 7.3 %Marathon County: 7 %Marinette County: 7.5 %Marquette County: 9 %Menominee County: 11.3 %Milwaukee County: 10.2 %Monroe County: 9.4 %Oconto County: 7.8 %Oneida County: 7 %Outagamie County: 7.1 %Ozaukee County: 4.5 %Pepin County: 8.7 %Pierce County: 6 %Polk County: 8.4 %Portage County: 7 %Price County: 7.8 %Racine County: 7.8 %Richland County: 9.2 %Rock County: 8.5 %Rusk County: 9.5 %St. Croix County: 5.1 %Sauk County: 8.2 %Sawyer County: 11.8 %Shawano County: 8.7 %Sheboygan County: 6.7 %Taylor County: 8.5 %Trempealeau County: 9.1 %Vernon County: 10.8 %Vilas County: 10.7 %Walworth County: 9.3 %Washburn County: 8.5 %Washington County: 5 %Waukesha County: 4.3 %Waupaca County: 7.6 %Waushara County: 9.8 %Winnebago County: 6.3 %Wood County: 6.8 %
  • Under 6.4
  • 6.4 to 7.2
  • 7.2 to 8.1
  • 8.1 to 8.8
  • 8.8 to 9.8
  • 9.8 and over
%, 2018. 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, 2018

Clark County: 15.7 %Clark County15.7Forest County: 12.1 %Forest County12.1Lafayette County: 11.8 %Lafayette County11.8Sawyer County: 11.8 %Sawyer County11.8Menominee County: 11.3 %Menominee County11.3Jackson County: 11.1 %Jackson County11.1Vernon County: 10.8 %Vernon County10.8Vilas County: 10.7 %Vilas County10.7Green Lake County: 10.3 %Green Lake County10.3Milwaukee County: 10.2 %Milwaukee County10.2Bayfield County: 9.9 %Bayfield County9.9Burnett County: 9.8 %Burnett County9.8Waushara County: 9.8 %Waushara County9.8Ashland County: 9.6 %Ashland County9.6Rusk County: 9.5 %Rusk County9.5Monroe County: 9.4 %Monroe County9.4Adams County: 9.3 %Adams County9.3Walworth County: 9.3 %Walworth County9.3Richland County: 9.2 %Richland County9.2Juneau County: 9.1 %Juneau County9.1Trempealeau County: 9.1 %Trempealeau County9.1Grant County: 9 %Grant County9Marquette County: 9 %Marquette County9Florence County: 8.8 %Florence County8.8Iron County: 8.8 %Iron County8.8Pepin County: 8.7 %Pepin County8.7Shawano County: 8.7 %Shawano County8.7Barron County: 8.6 %Barron County8.6Buffalo County: 8.6 %Buffalo County8.6Rock County: 8.5 %Rock County8.5Taylor County: 8.5 %Taylor County8.5Washburn County: 8.5 %Washburn County8.5Brown County: 8.4 %Brown County8.4Polk County: 8.4 %Polk County8.4Kenosha County: 8.3 %Kenosha County8.3Sauk County: 8.2 %Sauk County8.2Langlade County: 8.1 %Langlade County8.1Crawford County: 8 %Crawford County8Door County: 7.8 %Door County7.8Oconto County: 7.8 %Oconto County7.8Clark County: 15.7 %Clark County15.7Forest County: 12.1 %Forest County12.1Lafayette County: 11.8 %Lafayette County11.8Sawyer County: 11.8 %Sawyer County11.8Menominee County: 11.3 %Menominee County11.3Jackson County: 11.1 %Jackson County11.1Vernon County: 10.8 %Vernon County10.8Vilas County: 10.7 %Vilas County10.7Green Lake County: 10.3 %Green Lake County10.3Milwaukee County: 10.2 %Milwaukee County10.2Bayfield County: 9.9 %Bayfield County9.9Burnett County: 9.8 %Burnett County9.8Waushara County: 9.8 %Waushara County9.8Ashland County: 9.6 %Ashland County9.6Rusk County: 9.5 %Rusk County9.5Monroe County: 9.4 %Monroe County9.4Adams County: 9.3 %Adams County9.3Walworth County: 9.3 %Walworth County9.3Richland County: 9.2 %Richland County9.2Juneau County: 9.1 %Juneau County9.1Trempealeau County: 9.1 %Trempealeau County9.1Grant County: 9 %Grant County9Marquette County: 9 %Marquette County9Florence County: 8.8 %Florence County8.8Iron County: 8.8 %Iron County8.8Pepin County: 8.7 %Pepin County8.7Shawano County: 8.7 %Shawano County8.7Barron County: 8.6 %Barron County8.6Buffalo County: 8.6 %Buffalo County8.6Rock County: 8.5 %Rock County8.5Taylor County: 8.5 %Taylor County8.5Washburn County: 8.5 %Washburn County8.5Brown County: 8.4 %Brown County8.4Polk County: 8.4 %Polk County8.4Kenosha County: 8.3 %Kenosha County8.3Sauk County: 8.2 %Sauk County8.2Langlade County: 8.1 %Langlade County8.1Crawford County: 8 %Crawford County8Door County: 7.8 %Door County7.8Oconto County: 7.8 %Oconto County7.8
%. 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

RankCounties2018 (%)Change on 2017
1Clark County15.7-0.1 pts
2Forest County12.1-0.4 pts
3Lafayette County11.8+1.1 pts
3Sawyer County11.8+0.1 pts
5Menominee County11.3-2 pts
6Jackson County11.1+0.2 pts
7Vernon County10.8+0.1 pts
8Vilas County10.70 pts
9Green Lake County10.3+1.7 pts
10Milwaukee County10.2+0.3 pts
11Bayfield County9.9-0.2 pts
12Burnett County9.8+0.6 pts
12Waushara County9.8+0.5 pts
14Ashland County9.6+0.4 pts
15Rusk County9.5+0.2 pts
16Monroe County9.4+0.8 pts
17Adams County9.3+0.8 pts
17Walworth County9.3-0.4 pts
19Richland County9.2+0.7 pts
20Juneau County9.10 pts
20Trempealeau County9.1+0.3 pts
22Grant County9+0.2 pts
22Marquette County90 pts
24Florence County8.8+0.9 pts
24Iron County8.8+0.7 pts
26Pepin County8.7+0.4 pts
26Shawano County8.70 pts
28Barron County8.6-0.3 pts
28Buffalo County8.6+1.2 pts
30Rock County8.50 pts
30Taylor County8.5-0.7 pts
30Washburn County8.5+1 pts
33Brown County8.4+0.1 pts
33Polk County8.4+1.1 pts
35Kenosha County8.3+0.6 pts
36Sauk County8.2-0.2 pts
37Langlade County8.1+0.3 pts
38Crawford County8+1 pts
39Door County7.8+0.1 pts
39Oconto County7.8+0.9 pts
39Price County7.8+0.8 pts
39Racine County7.8+0.5 pts
43Jefferson County7.6+0.8 pts
43Waupaca County7.6+0.2 pts
45Marinette County7.5+0.5 pts
46Douglas County7.4-0.2 pts
47Manitowoc County7.3-0.1 pts
48Chippewa County7.2+0.8 pts
48Kewaunee County7.2+0.8 pts
50Outagamie County7.1+0.9 pts
51Marathon County7-0.2 pts
51Oneida County7+0.1 pts
51Portage County7+0.8 pts
54Eau Claire County6.9-0.4 pts
55Wood County6.8+0.4 pts
56Columbia County6.7+0.5 pts
56Dodge County6.7+0.5 pts
56Dunn County6.7-0.1 pts
56Sheboygan County6.7-0.3 pts
60Fond du Lac County6.4+0.2 pts
60Lincoln County6.4+0.1 pts
62Winnebago County6.3+0.2 pts
63Green County6-0.6 pts
63Pierce County6+0.4 pts
65Iowa County5.9-0.5 pts
66Dane County5.7-0.2 pts
67La Crosse County5.4-0.4 pts
68Calumet County5.1+0.1 pts
68St. Croix County5.1+0.1 pts
70Washington County5+0.3 pts
71Ozaukee County4.5+0.1 pts
72Waukesha County4.3-0.1 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-2018-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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018. 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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018.

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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_wisconsin_by_2018,
  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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018. 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-2018-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 Wisconsin by uninsured rate, ages 18 to 64 (US model-based estimate), 2018
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-2018-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/wisconsin-counties?period=2018.
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-2018-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 15.7% in 2018, according to the U.S. Census Bureau.

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

Waukesha County, with 4.3% in 2018.

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 Wisconsin: more rankings