Which county in Iowa has the lowest natural disaster risk?

Black Hawk has the lowest natural disaster risk in Iowa, at 41.4.

What is the natural disaster risk in Black Hawk?

Black Hawk is ranked #1 in Iowa for natural disaster risk, at 41.4.

What are the top counties in Iowa for natural disaster risk?

Black Hawk (41.4), then Story (45.0), and Linn (45.6). The full top 25 is in the table on this page.

How is this natural disaster risk ranking calculated?

Counties in Iowa are ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.

How does Iowa compare to the rest of the US for natural disaster risk?

This list is Iowa only. See the national ranking of the lowest counties for natural disaster risk at hearthmap.app/best/lowest-natural-disaster-risk.

Lowest Natural Disaster Risk Counties in Iowa (2026)

Lowest counties for natural disaster risk in Iowa

Top 25 of 99 counties with data.

Ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first.

Lowest counties for natural disaster risk in Iowa

Rank	County	Value
01	Black Hawk41.4 County page
02	Story45.0 County page
03	Linn45.6 County page
04	Webster48.5 County page
05	Dubuque49.2 County page
06	Palo Alto49.3 County page
07	Scott49.4 County page
08	Worth50.5 County page
09	Polk50.5 County page
10	Kossuth52.1 County page
11	Pottawattamie52.4 County page
12	Hancock52.6 County page
13	Humboldt54.0 County page
14	Buena Vista54.9 County page
15	Grundy54.9 County page
16	Boone55.6 County page
17	Bremer55.9 County page
18	Pocahontas55.9 County page
19	Woodbury56.1 County page
20	Greene56.5 County page
21	Emmet56.5 County page
22	Winnebago56.9 County page
23	Marshall57.5 County page
24	Cerro Gordo58.4 County page
25	Wright58.4 County page

How this ranking works

This page ranks Iowa counties by natural disaster risk, sorted so the lowest places appear first. Click any county to see its housing, schools, crime, and demographics in detail.

For natural disaster risk, a lower value is generally more favorable, so the top of the list is the lowest. Want to weigh natural disaster risk against schools, taxes, commute, and more at once? Use the live map to build a custom match.

Data comes from public sources. Source attribution and the exact data vintage are shown above and on the full map of natural disaster risk.

Frequently asked questions

Which county in Iowa has the lowest natural disaster risk?: Black Hawk has the lowest natural disaster risk in Iowa, at 41.4.
What is the natural disaster risk in Black Hawk?: Black Hawk is ranked #1 in Iowa for natural disaster risk, at 41.4.
What are the top counties in Iowa for natural disaster risk?: Black Hawk (41.4), then Story (45.0), and Linn (45.6). The full top 25 is in the table on this page.
How is this natural disaster risk ranking calculated?: Counties in Iowa are ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.
How does Iowa compare to the rest of the US for natural disaster risk?: This list is Iowa only. See the national ranking of the lowest counties for natural disaster risk at hearthmap.app/best/lowest-natural-disaster-risk.