Which county in Illinois has the lowest natural disaster risk?

DuPage has the lowest natural disaster risk in Illinois, at 38.5.

What is the natural disaster risk in DuPage?

DuPage is ranked #1 in Illinois for natural disaster risk, at 38.5.

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

DuPage (38.5), then Rock Island (43.2), and Cook (45.3). The full top 25 is in the table on this page.

How is this natural disaster risk ranking calculated?

Counties in Illinois 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 Illinois compare to the rest of the US for natural disaster risk?

This list is Illinois 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 Illinois (2026)

Lowest counties for natural disaster risk in Illinois

Top 25 of 102 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 Illinois

Rank	County	Value
01	DuPage38.5 County page
02	Rock Island43.2 County page
03	Cook45.3 County page
04	Winnebago45.4 County page
05	Lake46.7 County page
06	McLean49.1 County page
07	Kane50.2 County page
08	McDonough50.3 County page
09	Peoria50.7 County page
10	Will51.2 County page
11	Iroquois52.0 County page
12	Knox52.1 County page
13	Whiteside52.7 County page
14	Adams52.8 County page
15	Warren53.5 County page
16	McHenry53.7 County page
17	Brown54.7 County page
18	Schuyler54.7 County page
19	Kankakee55.1 County page
20	Macon55.1 County page
21	Greene55.4 County page
22	DeKalb55.7 County page
23	Champaign55.8 County page
24	Hancock57.4 County page
25	LaSalle57.7 County page

How this ranking works

This page ranks Illinois 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 Illinois has the lowest natural disaster risk?: DuPage has the lowest natural disaster risk in Illinois, at 38.5.
What is the natural disaster risk in DuPage?: DuPage is ranked #1 in Illinois for natural disaster risk, at 38.5.
What are the top counties in Illinois for natural disaster risk?: DuPage (38.5), then Rock Island (43.2), and Cook (45.3). The full top 25 is in the table on this page.
How is this natural disaster risk ranking calculated?: Counties in Illinois 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 Illinois compare to the rest of the US for natural disaster risk?: This list is Illinois only. See the national ranking of the lowest counties for natural disaster risk at hearthmap.app/best/lowest-natural-disaster-risk.