Iowa Threat Assessment
99 counties ranked by FEMA National Risk Index composite score.
| County | Threat Level | NRI Score | Rating |
|---|---|---|---|
| Woodbury County | High | 16.4 | Relatively Moderate |
| Pottawattamie County | High | 16.2 | Relatively Moderate |
| Webster County | High | 15.8 | Relatively Moderate |
| Linn County | High | 15.5 | Relatively Moderate |
| Calhoun County | High | 15.3 | Relatively Moderate |
| Polk County | High | 15.2 | Relatively Moderate |
| Crawford County | High | 15.1 | Relatively Moderate |
| Black Hawk County | High | 14.9 | Relatively Moderate |
| Sac County | High | 14.7 | Relatively Moderate |
| Carroll County | High | 14.5 | Relatively Moderate |
| O'Brien County | High | 14.5 | Relatively Moderate |
| Johnson County | High | 14.1 | Relatively Moderate |
| Marshall County | High | 13.8 | Relatively Moderate |
| Des Moines County | Elevated | 13.6 | Relatively Moderate |
| Buena Vista County | Elevated | 13.5 | Relatively Moderate |
| Poweshiek County | Elevated | 13.4 | Relatively Low |
| Tama County | Elevated | 13.3 | Relatively Low |
| Wright County | Elevated | 13.3 | Relatively Low |
| Cerro Gordo County | Elevated | 13.1 | Relatively Low |
| Cherokee County | Elevated | 13.1 | Relatively Low |
| Pocahontas County | Elevated | 13.1 | Relatively Low |
| Scott County | Elevated | 13.0 | Relatively Low |
| Montgomery County | Elevated | 12.8 | Relatively Low |
| Kossuth County | Elevated | 12.7 | Relatively Low |
| Ringgold County | Elevated | 12.7 | Relatively Low |
| Wapello County | Elevated | 12.7 | Relatively Low |
| Clinton County | Elevated | 12.6 | Relatively Low |
| Palo Alto County | Elevated | 12.6 | Relatively Low |
| Audubon County | Elevated | 12.5 | Relatively Low |
| Cass County | Elevated | 12.4 | Relatively Low |
| Dubuque County | Elevated | 12.2 | Relatively Low |
| Hardin County | Elevated | 12.2 | Relatively Low |
| Clayton County | Elevated | 12.0 | Relatively Low |
| Fayette County | Elevated | 11.8 | Relatively Low |
| Clay County | Elevated | 11.7 | Relatively Low |
| Hamilton County | Elevated | 11.7 | Relatively Low |
| Lee County | Elevated | 11.7 | Relatively Low |
| Greene County | Elevated | 11.6 | Relatively Low |
| Osceola County | Elevated | 11.6 | Relatively Low |
| Floyd County | Elevated | 11.4 | Relatively Low |
| Mitchell County | Elevated | 11.4 | Relatively Low |
| Wayne County | Elevated | 11.4 | Relatively Low |
| Winnebago County | Elevated | 11.4 | Relatively Low |
| Franklin County | Elevated | 11.2 | Relatively Low |
| Monona County | Elevated | 11.2 | Relatively Low |
| Guthrie County | Elevated | 11.1 | Relatively Low |
| Decatur County | Elevated | 11.0 | Relatively Low |
| Dickinson County | Elevated | 11.0 | Relatively Low |
| Sioux County | Elevated | 10.8 | Relatively Low |
| Taylor County | Elevated | 10.5 | Relatively Low |
| Washington County | Elevated | 10.4 | Relatively Low |
| Emmet County | Elevated | 10.3 | Relatively Low |
| Harrison County | Elevated | 10.3 | Relatively Low |
| Humboldt County | Elevated | 10.3 | Relatively Low |
| Jackson County | Elevated | 10.3 | Relatively Low |
| Davis County | Elevated | 10.2 | Relatively Low |
| Fremont County | Elevated | 10.2 | Relatively Low |
| Ida County | Elevated | 10.2 | Relatively Low |
| Clarke County | Elevated | 10.1 | Relatively Low |
| Page County | Elevated | 10.1 | Relatively Low |
| Adair County | Elevated | 10.0 | Relatively Low |
| Shelby County | Elevated | 9.9 | Relatively Low |
| Hancock County | Elevated | 9.8 | Relatively Low |
| Howard County | Elevated | 9.7 | Relatively Low |
| Jasper County | Elevated | 9.7 | Relatively Low |
| Muscatine County | Elevated | 9.6 | Relatively Low |
| Plymouth County | Elevated | 9.4 | Relatively Low |
| Worth County | Elevated | 9.3 | Relatively Low |
| Butler County | Elevated | 9.2 | Relatively Low |
| Union County | Elevated | 9.2 | Relatively Low |
| Delaware County | Moderate | 9.1 | Relatively Low |
| Boone County | Moderate | 9.0 | Relatively Low |
| Louisa County | Moderate | 8.9 | Relatively Low |
| Lucas County | Moderate | 8.9 | Relatively Low |
| Chickasaw County | Moderate | 8.8 | Relatively Low |
| Mahaska County | Moderate | 8.8 | Relatively Low |
| Appanoose County | Moderate | 8.7 | Relatively Low |
| Lyon County | Moderate | 8.6 | Relatively Low |
| Jones County | Moderate | 8.5 | Relatively Low |
| Cedar County | Moderate | 8.4 | Relatively Low |
| Van Buren County | Moderate | 8.3 | Relatively Low |
| Grundy County | Moderate | 8.2 | Relatively Low |
| Winneshiek County | Moderate | 8.2 | Relatively Low |
| Adams County | Moderate | 8.1 | Relatively Low |
| Story County | Moderate | 8.0 | Very Low |
| Allamakee County | Moderate | 7.9 | Very Low |
| Henry County | Moderate | 7.9 | Very Low |
| Monroe County | Moderate | 7.9 | Very Low |
| Iowa County | Moderate | 7.8 | Very Low |
| Keokuk County | Moderate | 7.6 | Very Low |
| Marion County | Moderate | 7.6 | Very Low |
| Benton County | Moderate | 7.4 | Very Low |
| Warren County | Moderate | 7.4 | Very Low |
| Buchanan County | Moderate | 7.3 | Very Low |
| Mills County | Moderate | 7.1 | Very Low |
| Bremer County | Moderate | 6.9 | Very Low |
| Jefferson County | Guarded | 5.6 | Very Low |
| Madison County | Guarded | 5.6 | Very Low |
| Dallas County | Guarded | 5.4 | Very Low |