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Tornado history in Iowa

Iowa has 27 county-level tornado declarations across 25 counties. Pottawattamie County leads with 2 declarations. Total tracked FEMA obligations for tornado events in this state: $7.1M.

This page shows every Iowa county in Iowa that has at least one FEMA tornado declaration on record, ranked by how many times that hazard type triggered federal aid. Counties near the top of this list have recurring exposure to tornado events — useful context for anyone evaluating property risk, insurance needs, or emergency planning in the area.

For the full national view of tornado declarations across all states, see the tornado disaster type page. For all hazard types in Iowa, see the Iowa state page.

Tornado in Iowa

Counties ranked by tornado declaration count

#CountyDeclarationsTracked aid
1Pottawattamie County2$2.4M
2Union County2$647K
3Calhoun County1$0
4Cerro Gordo County1$0
5Clarke County1$100K
6Crawford County1$241K
7Dallas County1$0
8Des Moines County1$0
9Fayette County1$0
10Floyd County1$0
11Hamilton County1$0
12Harrison County1$39K
13Howard County1$0
14Humboldt County1$0
15Johnson County1$0
16Kossuth County1$0
17Madison County1$0
18Mills County1$3K
19Page County1$0
20Polk County1$2.1M
21Ringgold County1$929K
22Shelby County1$684K
23Taylor County1$0
24Warren County1$0
25Wright County1$0