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State rollup

Iowa disaster history

County pages for Iowa, ordered by declaration count and backed by the FEMA datasets described in the brief.

Declarations
1,910
County declaration rows
Counties affected
99
State pages with county rollups
Tracked FEMA aid
$2.8B
PA + assistance signals
Top incident
Severe Storm
May 21, 2025
County directory

Counties with the most declarations

These are the county pages most likely to match long-tail “county + disaster history” searches.

Clayton County27 declarationsDes Moines County27 declarationsPottawattamie County26 declarationsBuchanan County25 declarationsButler County25 declarationsHarrison County24 declarationsJohnson County24 declarationsWright County24 declarationsCherokee County23 declarationsCrawford County23 declarationsHoward County23 declarationsIowa County23 declarationsLinn County23 declarationsPalo Alto County23 declarationsAllamakee County22 declarationsAudubon County22 declarationsBuena Vista County22 declarationsClinton County22 declarationsFayette County22 declarationsFranklin County22 declarationsHumboldt County22 declarationsJones County22 declarationsLee County22 declarationsPocahontas County22 declarationsClay County21 declarationsDubuque County21 declarationsHamilton County21 declarationsJackson County21 declarationsMuscatine County21 declarationsStory County21 declarationsTama County21 declarationsUnion County21 declarationsWinneshiek County21 declarationsBlack Hawk County20 declarationsDallas County20 declarationsFloyd County20 declarationsIda County20 declarationsKossuth County20 declarationsLouisa County20 declarationsMadison County20 declarationsMahaska County20 declarationsMarshall County20 declarationsMills County20 declarationsMitchell County20 declarationsMonona County20 declarationsMontgomery County20 declarationsPolk County20 declarationsRinggold County20 declarationsScott County20 declarationsShelby County20 declarationsWapello County20 declarationsWebster County20 declarationsCass County19 declarationsChickasaw County19 declarationsEmmet County19 declarationsFremont County19 declarationsGreene County19 declarationsKeokuk County19 declarationsMarion County19 declarationsSac County19 declarationsBenton County18 declarationsCalhoun County18 declarationsCedar County18 declarationsDelaware County18 declarationsDickinson County18 declarationsHardin County18 declarationsJasper County18 declarationsWoodbury County18 declarationsAdair County17 declarationsAdams County17 declarationsBoone County17 declarationsBremer County17 declarationsDavis County17 declarationsGuthrie County17 declarationsWarren County17 declarationsAppanoose County16 declarationsCarroll County16 declarationsClarke County16 declarationsHenry County16 declarationsLyon County16 declarationsMonroe County16 declarationsPage County16 declarationsPlymouth County16 declarationsVan Buren County16 declarationsWinnebago County16 declarationsWorth County16 declarationsCerro Gordo County15 declarationsGrundy County15 declarationsHancock County15 declarationsLucas County15 declarationsO'Brien County15 declarationsOsceola County15 declarationsPoweshiek County15 declarationsSioux County15 declarationsWashington County15 declarationsWayne County15 declarationsDecatur County14 declarationsTaylor County14 declarationsJefferson County12 declarations
Recent declarations

Latest county-level events

About this state

FEMA disaster context for Iowa

Iowa has 1,910 county-level FEMA disaster declarations spread across 99 counties. The most common declaration type is severe storm. Across all counties, FEMA datasets track $2.8B in combined public and individual assistance obligations.

The counties with the heaviest disaster history are Clayton County (27 declarations), Des Moines County (27), and Pottawattamie County (26). Each county page breaks down the timeline, hazard mix, spending categories, and flood insurance signals for that specific area.

Declaration counts reflect how often FEMA formally declared a disaster or emergency affecting a county — not the total number of natural events. A single hurricane can generate declarations across dozens of counties and multiple states. The county pages linked above show the per-county detail behind these state-level totals.