| # | County | Expected annual loss |
|---|---|---|
| 1 | Polk County | $137.6M |
| 2 | Johnson County | $96.3M |
| 3 | Linn County | $79.1M |
| 4 | Scott County | $66.5M |
| 5 | Woodbury County | $50.7M |
| 6 | Pottawattamie County | $49.6M |
| 7 | Black Hawk County | $41.8M |
| 8 | Dubuque County | $41.7M |
| 9 | Dallas County | $39.7M |
| 10 | Story County | $36.1M |
| 11 | Sioux County | $29.8M |
| 12 | Cerro Gordo County | $27.4M |
| 13 | Clinton County | $25.4M |
| 14 | Webster County | $24.7M |
| 15 | Wapello County | $24.1M |
| 16 | Crawford County | $23.6M |
| 17 | Marshall County | $22.7M |
| 18 | Carroll County | $22.7M |
| 19 | Lee County | $22.6M |
| 20 | Hardin County | $20.4M |
| 21 | Muscatine County | $20.3M |
| 22 | Des Moines County | $19.5M |
| 23 | Warren County | $18.7M |
| 24 | Plymouth County | $17.6M |
| 25 | Clay County | $17.1M |
Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Expected Annual Loss from Natural Hazards in Iowa”, https://gismap.land/rankings/iowa/highest-expected-loss-counties. Figures from FEMA National Risk Index (December 2025).
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