GIS Map
RankingsIowaWorst drought

Counties in the Worst Drought in Iowa

The top 25 of 99 Iowa counties on GIS Map, ranked by the Drought Severity and Coverage Index (0-500), where 500 means the entire county is in exceptional drought.

#CountyDrought Severity Index
1Kossuth County
51.0
2Palo Alto County
18.6
3Humboldt County
13.1
4Osceola County
10.1
5Dickinson County
9.0
6Lyon County
2.3
7Monona County
0.8
8Woodbury County
0.6
9Pocahontas County
0.2
10Adair County
0.0
11Adams County
0.0
12Allamakee County
0.0
13Appanoose County
0.0
14Audubon County
0.0
15Benton County
0.0
16Black Hawk County
0.0
17Boone County
0.0
18Bremer County
0.0
19Buchanan County
0.0
20Buena Vista County
0.0
21Butler County
0.0
22Calhoun County
0.0
23Carroll County
0.0
24Cass County
0.0
25Cedar County
0.0

Source: U.S. Drought Monitor (13 October 2026). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties in the Worst Drought in Iowa”, https://gismap.land/rankings/iowa/worst-drought-counties. Figures from U.S. Drought Monitor (13 October 2026).

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