Mahaska, IA
Mahaska County in Iowa has 8 FEMA disaster declarations on record covering 1965–2019, most recently Severe Storms and Flooding on Mar 23, 2019 (DR-4421). Its flood risk grade is A (Low risk), ranking #1093 of 3,277 U.S. counties, with 0 NFIP flood insurance claims totaling $0 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Mahaska County
The 8 most recent federally declared disasters affecting Mahaska County, IA (1965–2019). Total declarations on record: 8.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Mar 23, 2019 | Flood | Severe Storms and Flooding | DR-4421 |
| Sep 10, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3239 |
| Jul 2, 1998 | Flood | Severe Storms, Tornadoes and Flooding | DR-1230 |
| Jul 9, 1993 | Flood | Severe Storms & Flooding | DR-996 |
| May 26, 1990 | Flood | Severe Storms & Flooding | DR-868 |
| Jun 24, 1974 | Flood | Severe Storms & Flooding | DR-443 |
| May 23, 1973 | Flood | Severe Storms & Flooding | DR-386 |
| Apr 22, 1965 | Flood | Flooding | DR-193 |
Score Breakdown
The composite score of 12 is calculated from four weighted factors. See our methodology for details.
Other Counties in Iowa
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Jackson | A | 12 | 2 | 9 |
| Audubon | A | 12 | 0 | 8 |
| Buena Vista | A | 12 | 0 | 8 |
| Carroll | A | 12 | 0 | 8 |
| Cass | A | 12 | 0 | 8 |
| Clay | A | 12 | 12 | 8 |
More Counties in Iowa
Frequently Asked Questions
How many FEMA disaster declarations does Mahaska County, IA have?
Mahaska County, IA has 8 federal disaster declarations on FEMA record (1965–2019). The 5 most recent are: Severe Storms and Flooding (declared Mar 23, 2019, DR-4421); Hurricane Katrina Evacuation (declared Sep 10, 2005, DR-3239); Severe Storms, Tornadoes and Flooding (declared Jul 2, 1998, DR-1230); Severe Storms & Flooding (declared Jul 9, 1993, DR-996); Severe Storms & Flooding (declared May 26, 1990, DR-868). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Mahaska County, IA?
Mahaska County is graded A (composite score 12/100, low risk). It ranks #1093 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in Mahaska County?
0 NFIP flood insurance claims have been filed in Mahaska County, IA, totaling $0 in payouts. The average claim is $0. Source: FEMA FimaNfipClaims v2 dataset.
Has Mahaska County, IA had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Mahaska County was Severe Storms and Flooding on Mar 23, 2019 (DR-4421). The county has 8 declared disasters in the OpenFEMA record covering 1965–2019.
this entity is one of the data points covered by this site’s U.S. flood risk, NFIP claims, and disaster declarations dataset. The detail above comes directly from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims; the context that follows situates the headline numbers against the broader distribution across U.S. ZIPs, counties, and states.
The methodology behind every numeric value on this page is publicly documented on the FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. ZIPs, counties, and states with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: FEMA OpenFEMA datasets, 2026.