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Counties with the Highest Natural Hazard Risk in Wisconsin

The top 25 of 72 Wisconsin counties on GIS Map, ranked by FEMA National Risk Index score (0-100, national percentile).

#CountyRisk Index score
1Milwaukee County
98.4
2Dane County
93.9
3Brown County
90.0
4Waukesha County
88.9
5Marathon County
87.2
6Winnebago County
86.8
7Rock County
86.4
8Racine County
85.4
9Kenosha County
85.0
10Columbia County
81.4
11La Crosse County
80.5
12Marinette County
80.0
13Outagamie County
79.7
14Monroe County
78.8
15Eau Claire County
78.3
16Fond du Lac County
76.3
17Wood County
75.9
18Jefferson County
75.8
19Vernon County
75.0
20Walworth County
74.8
21Sawyer County
74.5
22Sauk County
72.1
23Adams County
70.9
24Juneau County
70.8
25Sheboygan County
70.2

Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Highest Natural Hazard Risk in Wisconsin”, https://gismap.land/rankings/wisconsin/highest-risk-counties. Figures from FEMA National Risk Index (December 2025).

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