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Wisconsin natural disaster risk

Ratings for all 72 counties, the federal disaster record and flood insurance across the state.

47major disasters since 1953 (31th most)

$2.6Bexpected losses a year

0.5%of homes with flood insurance

Photo: The original uploader was Miwdke at English Wikipedia., CC BY 2.0

Wisconsin has had 47 major federal disaster declarations for natural events since 1953. FEMA expects about $2.6 billion a year in losses from natural hazards across the state. Inland flooding is the costliest hazard in 51 of its 72 counties, followed by cold wave in 20. None is rated Very High overall. About 0.5% of homes carry federal flood insurance, and the program has paid $142 million on 9,395 claims here since 1978.

Very High0counties

High1counties

Moderate9counties

Low47counties

Highest overall risk

1Milwaukee CountyHigh

2Dane CountyModerate

3Brown CountyModerate

4Waukesha CountyModerate

5Marathon CountyModerate

Lowest risk (50,000+ people)

1Calumet CountyVery Low

2Ozaukee CountyLow

3Grant CountyLow

4Portage CountyLow

5St. Croix CountyLow

Top hazards

Inland floodingtop risk in 51 counties

Cold wavetop risk in 20 counties

Hailtop risk in 1 counties

Recent federal declarations

All states ›

Oct 7, 2026Severe Storms and TornadoesMajor disaster

Largest counties

Milwaukee County

939,336 people

High Cold wave

Dane County

561,270 people

Moderate Inland flooding

Waukesha County

406,817 people

Moderate Inland flooding

Brown County

268,585 people

Moderate Inland flooding

Racine County

197,542 people

Moderate Inland flooding

Outagamie County

190,651 people

Low Inland flooding

Winnebago County

171,623 people

Moderate Inland flooding

Kenosha County

168,940 people

Moderate Cold wave

Rock County

163,608 people

Moderate Inland flooding

Marathon County

137,975 people

Moderate Inland flooding

Washington County

136,723 people

Low Inland flooding

La Crosse County

120,545 people

Low Inland flooding

Cities in Wisconsin

All 35 cities ›

Milwaukee566,973 Madison278,001 Green Bay106,253 Kenosha99,372 Racine77,633 Appleton75,023 Waukesha71,233 Eau Claire70,322 Oshkosh66,729 Janesville66,030 West Allis59,612 La Crosse51,356 Sheboygan49,645 Wauwatosa48,529 Fond du Lac44,494

All 72 counties

Name	People	Overall risk	Top hazard	Declarations	Homes insured
Adams County	20,645	Low	Inland flooding	10	0.2%
Ashland County	16,024	Very Low	Cold wave	12	0.2%
Barron County	46,685	Low	Cold wave	8	0.2%
Bayfield County	16,173	Very Low	Cold wave	10	0.2%
Brown County	268,585	Moderate	Inland flooding	7	0.6%
Buffalo County	13,283	Very Low	Inland flooding	14	0.7%
Burnett County	16,515	Low	Inland flooding	8	0.4%
Calumet County	52,428	Very Low	Inland flooding	9	0.3%
Chippewa County	66,228	Low	Inland flooding	9	0.4%
Clark County	34,630	Low	Inland flooding	13	0.1%
Columbia County	58,373	Moderate	Hail	9	0.6%
Crawford County	16,088	Low	Inland flooding	20	1%
Dane County	561,270	Moderate	Inland flooding	17	0.4%
Dodge County	89,297	Low	Inland flooding	11	0.3%
Door County	30,054	Low	Inland flooding	4	0.7%
Douglas County	44,212	Low	Cold wave	8	0.3%
Dunn County	45,411	Low	Inland flooding	11	0.3%
Eau Claire County	105,611	Low	Inland flooding	7	0.2%
Florence County	4,558	Low	Cold wave	4	0.2%
Fond du Lac County	104,053	Low	Inland flooding	10	1.1%
Forest County	9,147	Low	Cold wave	6	0.1%
Grant County	51,299	Low	Inland flooding	18	0.4%
Green County	37,080	Low	Inland flooding	15	0.3%
Green Lake County	18,977	Low	Inland flooding	7	0.4%
Iowa County	23,675	Very Low	Inland flooding	15	0.2%
Iron County	6,133	Very Low	Cold wave	10	0.4%
Jackson County	21,028	Low	Inland flooding	12	0.4%
Jefferson County	84,877	Low	Inland flooding	12	0.5%
Juneau County	26,694	Low	Inland flooding	14	0.5%
Kenosha County	168,940	Moderate	Cold wave	14	0.3%
Kewaunee County	20,563	Very Low	Inland flooding	6	0.3%
La Crosse County	120,545	Low	Inland flooding	16	1.2%
Lafayette County	16,579	Very Low	Cold wave	12	0.3%
Langlade County	19,481	Low	Cold wave	6	0.4%
Lincoln County	28,413	Low	Inland flooding	7	0.2%
Manitowoc County	81,299	Low	Inland flooding	7	0.2%
Marathon County	137,975	Moderate	Inland flooding	10	0.4%
Marinette County	41,861	Low	Cold wave	5	0.3%
Marquette County	15,562	Low	Cold wave	7	0.5%
Menominee County	4,229	Very Low	Cold wave	5	0%
Milwaukee County	939,336	High	Cold wave	20	0.5%
Monroe County	46,230	Low	Inland flooding	13	0.6%
Oconto County	38,902	Low	Inland flooding	4	0.5%
Oneida County	37,792	Low	Cold wave	7	0.1%
Outagamie County	190,651	Low	Inland flooding	10	0.3%
Ozaukee County	91,247	Low	Inland flooding	11	1.5%
Pepin County	7,313	Very Low	Inland flooding	11	0.6%
Pierce County	42,203	Very Low	Inland flooding	11	0.4%
Polk County	44,964	Low	Inland flooding	8	0.2%
Portage County	70,351	Low	Inland flooding	10	0.2%
Price County	14,040	Very Low	Inland flooding	6	0.2%
Racine County	197,542	Moderate	Inland flooding	15	0.5%
Richland County	17,280	Low	Inland flooding	17	0.3%
Rock County	163,608	Moderate	Inland flooding	14	0.4%
Rusk County	14,175	Very Low	Inland flooding	10	0.2%
Sauk County	65,699	Low	Inland flooding	13	0.5%
Sawyer County	18,035	Low	Cold wave	7	0.4%
Shawano County	40,839	Low	Cold wave	6	0.2%
Sheboygan County	117,195	Low	Inland flooding	9	0.3%
St. Croix County	93,429	Low	Inland flooding	9	0.4%
Taylor County	19,911	Very Low	Inland flooding	6	0.1%
Trempealeau County	30,701	Low	Inland flooding	13	0.6%
Vernon County	30,574	Low	Cold wave	21	0.3%
Vilas County	23,031	Low	Cold wave	5	0.1%
Walworth County	106,413	Low	Inland flooding	11	0.3%
Washburn County	16,613	Very Low	Cold wave	8	0.4%
Washington County	136,723	Low	Inland flooding	12	0.6%
Waukesha County	406,817	Moderate	Inland flooding	17	0.5%
Waupaca County	51,795	Low	Inland flooding	9	0.7%
Waushara County	24,507	Low	Inland flooding	8	0.4%
Winnebago County	171,623	Moderate	Inland flooding	10	0.8%
Wood County	74,164	Low	Inland flooding	11	0.4%

Linked names have a full page. Overall risk from the FEMA National Risk Index (December 2025); declarations are federal disaster and emergency declarations for natural events since 1953 (OpenFEMA); homes insured is the share with NFIP flood policies.