Data / Rankings / Uninsured rate, under 65 (US model-based estimate) / Counties in Wisconsin

Counties in Wisconsin by uninsured rate, under 65 (US model-based estimate)

Clark County had the highest uninsured rate, under 65 (US model-based estimate) of 72 counties in 2018, at 17.3%. Waukesha County had the lowest, at 3.8%. The median was 7.2% and the figure for Wisconsin was 6.5%. Source: the U.S. Census Bureau.

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Highest17.3Clark County
Lowest3.8Waukesha County
Median7.272 counties
Wisconsin6.5History

Map of counties, 2018

Adams County: 8.5 %Ashland County: 8.2 %Barron County: 8 %Bayfield County: 9.1 %Brown County: 7.1 %Buffalo County: 7.8 %Burnett County: 8.8 %Calumet County: 4.4 %Chippewa County: 6.5 %Clark County: 17.3 %Columbia County: 6.1 %Crawford County: 7.2 %Dane County: 4.9 %Dodge County: 5.8 %Door County: 7.1 %Douglas County: 6.5 %Dunn County: 6 %Eau Claire County: 6.1 %Florence County: 8 %Fond du Lac County: 5.7 %Forest County: 10.5 %Grant County: 8.5 %Green County: 5.4 %Green Lake County: 9.7 %Iowa County: 5.3 %Iron County: 7.9 %Jackson County: 9.7 %Jefferson County: 6.5 %Juneau County: 8 %Kenosha County: 6.9 %Kewaunee County: 6.3 %La Crosse County: 4.7 %Lafayette County: 10.8 %Langlade County: 7.3 %Lincoln County: 5.8 %Manitowoc County: 6.5 %Marathon County: 6.1 %Marinette County: 6.6 %Marquette County: 8.4 %Menominee County: 8.3 %Milwaukee County: 8.2 %Monroe County: 8.5 %Oconto County: 6.9 %Oneida County: 6.3 %Outagamie County: 6.2 %Ozaukee County: 4 %Pepin County: 8 %Pierce County: 5.5 %Polk County: 7.4 %Portage County: 6 %Price County: 7.2 %Racine County: 6.5 %Richland County: 8.5 %Rock County: 7.1 %Rusk County: 8.7 %St. Croix County: 4.4 %Sauk County: 7.2 %Sawyer County: 10.5 %Shawano County: 7.8 %Sheboygan County: 5.9 %Taylor County: 7.5 %Trempealeau County: 8.4 %Vernon County: 10.4 %Vilas County: 9.6 %Walworth County: 8.2 %Washburn County: 7.5 %Washington County: 4.3 %Waukesha County: 3.8 %Waupaca County: 6.7 %Waushara County: 8.8 %Winnebago County: 5.5 %Wood County: 6.1 %
  • Under 5.8
  • 5.8 to 6.4
  • 6.4 to 7.2
  • 7.2 to 8
  • 8 to 8.5
  • 8.5 and over
%, 2018. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2018

Clark County: 17.3 %Clark County17.3Lafayette County: 10.8 %Lafayette County10.8Forest County: 10.5 %Forest County10.5Sawyer County: 10.5 %Sawyer County10.5Vernon County: 10.4 %Vernon County10.4Green Lake County: 9.7 %Green Lake County9.7Jackson County: 9.7 %Jackson County9.7Vilas County: 9.6 %Vilas County9.6Bayfield County: 9.1 %Bayfield County9.1Burnett County: 8.8 %Burnett County8.8Waushara County: 8.8 %Waushara County8.8Rusk County: 8.7 %Rusk County8.7Adams County: 8.5 %Adams County8.5Grant County: 8.5 %Grant County8.5Monroe County: 8.5 %Monroe County8.5Richland County: 8.5 %Richland County8.5Marquette County: 8.4 %Marquette County8.4Trempealeau County: 8.4 %Trempealeau County8.4Menominee County: 8.3 %Menominee County8.3Ashland County: 8.2 %Ashland County8.2Milwaukee County: 8.2 %Milwaukee County8.2Walworth County: 8.2 %Walworth County8.2Barron County: 8 %Barron County8Florence County: 8 %Florence County8Juneau County: 8 %Juneau County8Pepin County: 8 %Pepin County8Iron County: 7.9 %Iron County7.9Buffalo County: 7.8 %Buffalo County7.8Shawano County: 7.8 %Shawano County7.8Taylor County: 7.5 %Taylor County7.5Washburn County: 7.5 %Washburn County7.5Polk County: 7.4 %Polk County7.4Langlade County: 7.3 %Langlade County7.3Crawford County: 7.2 %Crawford County7.2Price County: 7.2 %Price County7.2Sauk County: 7.2 %Sauk County7.2Brown County: 7.1 %Brown County7.1Door County: 7.1 %Door County7.1Rock County: 7.1 %Rock County7.1Kenosha County: 6.9 %Kenosha County6.9Clark County: 17.3 %Clark County17.3Lafayette County: 10.8 %Lafayette County10.8Forest County: 10.5 %Forest County10.5Sawyer County: 10.5 %Sawyer County10.5Vernon County: 10.4 %Vernon County10.4Green Lake County: 9.7 %Green Lake County9.7Jackson County: 9.7 %Jackson County9.7Vilas County: 9.6 %Vilas County9.6Bayfield County: 9.1 %Bayfield County9.1Burnett County: 8.8 %Burnett County8.8Waushara County: 8.8 %Waushara County8.8Rusk County: 8.7 %Rusk County8.7Adams County: 8.5 %Adams County8.5Grant County: 8.5 %Grant County8.5Monroe County: 8.5 %Monroe County8.5Richland County: 8.5 %Richland County8.5Marquette County: 8.4 %Marquette County8.4Trempealeau County: 8.4 %Trempealeau County8.4Menominee County: 8.3 %Menominee County8.3Ashland County: 8.2 %Ashland County8.2Milwaukee County: 8.2 %Milwaukee County8.2Walworth County: 8.2 %Walworth County8.2Barron County: 8 %Barron County8Florence County: 8 %Florence County8Juneau County: 8 %Juneau County8Pepin County: 8 %Pepin County8Iron County: 7.9 %Iron County7.9Buffalo County: 7.8 %Buffalo County7.8Shawano County: 7.8 %Shawano County7.8Taylor County: 7.5 %Taylor County7.5Washburn County: 7.5 %Washburn County7.5Polk County: 7.4 %Polk County7.4Langlade County: 7.3 %Langlade County7.3Crawford County: 7.2 %Crawford County7.2Price County: 7.2 %Price County7.2Sauk County: 7.2 %Sauk County7.2Brown County: 7.1 %Brown County7.1Door County: 7.1 %Door County7.1Rock County: 7.1 %Rock County7.1Kenosha County: 6.9 %Kenosha County6.9
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2018 (%)Change on 2017
1Clark County17.3+0.8 pts
2Lafayette County10.8-0.2 pts
3Forest County10.5-0.9 pts
3Sawyer County10.5-0.2 pts
5Vernon County10.4-0.2 pts
6Green Lake County9.7+1.5 pts
6Jackson County9.7-0.4 pts
8Vilas County9.6-0.6 pts
9Bayfield County9.1-0.1 pts
10Burnett County8.8+0.4 pts
10Waushara County8.8+0.4 pts
12Rusk County8.7-0.1 pts
13Adams County8.5+0.6 pts
13Grant County8.5+0.4 pts
13Monroe County8.5+0.8 pts
13Richland County8.5+0.6 pts
17Marquette County8.4-0.1 pts
17Trempealeau County8.4+0.8 pts
19Menominee County8.3-1.6 pts
20Ashland County8.2+0.3 pts
20Milwaukee County8.2+0.1 pts
20Walworth County8.2-0.3 pts
23Barron County80 pts
23Florence County8+0.6 pts
23Juneau County8-0.1 pts
23Pepin County80 pts
27Iron County7.9+0.6 pts
28Buffalo County7.8+0.8 pts
28Shawano County7.8-0.1 pts
30Taylor County7.5-0.9 pts
30Washburn County7.5+0.7 pts
32Polk County7.4+0.9 pts
33Langlade County7.3+0.4 pts
34Crawford County7.2+0.7 pts
34Price County7.2+0.4 pts
34Sauk County7.2-0.1 pts
37Brown County7.1-0.1 pts
37Door County7.1+0.1 pts
37Rock County7.1-0.1 pts
40Kenosha County6.9+0.3 pts
40Oconto County6.9+0.6 pts
42Waupaca County6.70 pts
43Marinette County6.6+0.4 pts
44Chippewa County6.5+0.8 pts
44Douglas County6.5-0.1 pts
44Jefferson County6.5+0.6 pts
44Manitowoc County6.50 pts
44Racine County6.5+0.3 pts
49Kewaunee County6.3+0.7 pts
49Oneida County6.30 pts
51Outagamie County6.2+0.9 pts
52Columbia County6.1+0.5 pts
52Eau Claire County6.1-0.4 pts
52Marathon County6.1-0.4 pts
52Wood County6.1+0.6 pts
56Dunn County60 pts
56Portage County6+0.5 pts
58Sheboygan County5.9-0.2 pts
59Dodge County5.8+0.3 pts
59Lincoln County5.8+0.1 pts
61Fond du Lac County5.7+0.2 pts
62Pierce County5.5+0.6 pts
62Winnebago County5.5+0.2 pts
64Green County5.4-0.4 pts
65Iowa County5.3-0.3 pts
66Dane County4.9-0.2 pts
67La Crosse County4.7-0.3 pts
68Calumet County4.40 pts
68St. Croix County4.4-0.2 pts
70Washington County4.3+0.1 pts
71Ozaukee County4+0.1 pts
72Waukesha County3.80 pts

Other periods

About this ranking

People under 65 without health insurance coverage of any kind, as a percentage of all people under 65. 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. People 65 and over are left out because nearly all of them have Medicare.

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, under 65, 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, under 65, all races, both sexes, all income levels, states and counties (Counties in Wisconsin by uninsured rate, under 65 (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, under 65, all races, both sexes, all income levels, states and counties, Counties in Wisconsin by uninsured rate, under 65 (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-under-65/wisconsin-counties?period=2018. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Counties in Wisconsin by uninsured rate, under 65 (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-under-65/wisconsin-counties?period=2018.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Wisconsin by uninsured rate, under 65 (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-under-65/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, under 65, all races, both sexes, all income levels, states and counties: Counties in Wisconsin by uninsured rate, under 65 (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-under-65/wisconsin-counties?period=2018. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, 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, under 65, all races, both sexes, all income levels, states and counties: Counties in Wisconsin by uninsured rate, under 65 (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-under-65/wisconsin-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/wisconsin-counties?period=2018.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, 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, under 65 (US model-based estimate)?

Clark County, with 17.3% in 2018, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 65 (US model-based estimate)?

Waukesha County, with 3.8% 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, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 65 (US model-based estimate): other rankings

Counties in Wisconsin: more rankings