Updated April 2026
Flood Risk in Iowa
Iowa has 100 counties with flood risk data, 108 total NFIP flood insurance claims, and an average risk score of 12 out of 100.
100
Counties
108
NFIP Claims
$3,574,833
Total Payouts
12
Avg Risk Score
Grade Distribution
A
100
counties
B
0
counties
C
0
counties
D
0
counties
F
0
counties
Riskiest in Iowa
| County | Grade | Score |
|---|---|---|
| Des Moines | A | 19 |
| Clayton | A | 16 |
| Allamakee | A | 15 |
| Clinton | A | 15 |
| Johnson | A | 15 |
All 100 Counties in Iowa
Sorted by flood risk score, highest to lowest.
| # | County | Grade | Score | Claims | Payouts | Disasters |
|---|---|---|---|---|---|---|
| 1 | Des Moines | A | 19 | 6 | $115,189 | 14 |
| 2 | Clayton | A | 16 | 2 | $27,441 | 15 |
| 3 | Allamakee | A | 15 | 0 | $0 | 13 |
| 4 | Clinton | A | 15 | 1 | $2,851 | 13 |
| 5 | Johnson | A | 15 | 0 | $0 | 13 |
| 6 | Buchanan | A | 14 | 1 | $13,011 | 12 |
| 7 | Butler | A | 14 | 6 | $202,225 | 12 |
| 8 | Louisa | A | 14 | 0 | $0 | 12 |
| 9 | Linn | A | 14 | 11 | $33,246 | 12 |
| 10 | Dubuque | A | 13 | 2 | $1,547 | 11 |
| 11 | Lee | A | 13 | 0 | $0 | 10 |
| 12 | Fayette | A | 13 | 0 | $0 | 11 |
| 13 | Franklin | A | 13 | 0 | $0 | 11 |
| 14 | Iowa | A | 13 | 0 | $0 | 10 |
| 15 | Marshall | A | 13 | 0 | $0 | 10 |
| 16 | Tama | A | 13 | 1 | $18,228 | 11 |
| 17 | Wapello | A | 13 | 0 | $0 | 10 |
| 18 | Winneshiek | A | 13 | 2 | $78,876 | 10 |
| 19 | Fremont | A | 13 | 8 | $585,863 | 10 |
| 20 | Harrison | A | 13 | 0 | $0 | 10 |
| 21 | Muscatine | A | 13 | 1 | $0 | 11 |
| 22 | Marion | A | 13 | 0 | $0 | 10 |
| 23 | Black Hawk | A | 13 | 17 | $454,147 | 10 |
| 24 | Jackson | A | 12 | 1 | $3,752 | 9 |
| 25 | Audubon | A | 12 | 0 | $0 | 8 |
| 26 | Bremer | A | 12 | 3 | $41,647 | 9 |
| 27 | Buena Vista | A | 12 | 0 | $0 | 8 |
| 28 | Carroll | A | 12 | 0 | $0 | 8 |
| 29 | Cass | A | 12 | 0 | $0 | 8 |
| 30 | Clay | A | 12 | 2 | $126,267 | 8 |
| 31 | Crawford | A | 12 | 0 | $0 | 9 |
| 32 | Dickinson | A | 12 | 0 | $0 | 8 |
| 33 | Emmet | A | 12 | 0 | $0 | 9 |
| 34 | Floyd | A | 12 | 1 | $464 | 9 |
| 35 | Greene | A | 12 | 0 | $0 | 8 |
| 36 | Hamilton | A | 12 | 0 | $0 | 8 |
| 37 | Howard | A | 12 | 0 | $0 | 9 |
| 38 | Jones | A | 12 | 0 | $0 | 9 |
| 39 | Keokuk | A | 12 | 0 | $0 | 9 |
| 40 | Kossuth | A | 12 | 0 | $0 | 8 |
| 41 | Madison | A | 12 | 0 | $0 | 9 |
| 42 | Mahaska | A | 12 | 0 | $0 | 8 |
| 43 | Monroe | A | 12 | 0 | $0 | 8 |
| 44 | Palo Alto | A | 12 | 0 | $0 | 8 |
| 45 | Polk | A | 12 | 9 | $525,528 | 9 |
| 46 | Ringgold | A | 12 | 0 | $0 | 9 |
| 47 | Webster | A | 12 | 0 | $0 | 8 |
| 48 | Wright | A | 12 | 0 | $0 | 9 |
| 49 | Mills | A | 12 | 2 | $379,460 | 8 |
| 50 | Monona | A | 12 | 0 | $0 | 8 |
| 51 | Pottawattamie | A | 12 | 4 | $122,407 | 8 |
| 52 | Woodbury | A | 12 | 2 | $6,006 | 8 |
| 53 | Chickasaw | A | 12 | 3 | $7,475 | 9 |
| 54 | Cedar | A | 12 | 1 | $20,864 | 8 |
| 55 | Benton | A | 12 | 2 | $0 | 9 |
| 56 | Delaware | A | 12 | 0 | $0 | 9 |
| 57 | Sac and Fox Tribe of the Mississippi in Iowa | A | 11 | 0 | $0 | 7 |
| 58 | Adams | A | 11 | 0 | $0 | 6 |
| 59 | Appanoose | A | 11 | 0 | $0 | 6 |
| 60 | Boone | A | 11 | 1 | $37,488 | 6 |
| 61 | Cherokee | A | 11 | 0 | $0 | 7 |
| 62 | Dallas | A | 11 | 0 | $0 | 7 |
| 63 | Davis | A | 11 | 0 | $0 | 7 |
| 64 | Decatur | A | 11 | 0 | $0 | 7 |
| 65 | Hancock | A | 11 | 0 | $0 | 6 |
| 66 | Hardin | A | 11 | 0 | $0 | 7 |
| 67 | Henry | A | 11 | 0 | $0 | 7 |
| 68 | Humboldt | A | 11 | 0 | $0 | 7 |
| 69 | Ida | A | 11 | 0 | $0 | 7 |
| 70 | Jasper | A | 11 | 0 | $0 | 7 |
| 71 | Lucas | A | 11 | 0 | $0 | 7 |
| 72 | Lyon | A | 11 | 1 | $55,425 | 7 |
| 73 | Mitchell | A | 11 | 1 | $9,034 | 7 |
| 74 | Montgomery | A | 11 | 0 | $0 | 7 |
| 75 | Osceola | A | 11 | 0 | $0 | 7 |
| 76 | Page | A | 11 | 0 | $0 | 7 |
| 77 | Plymouth | A | 11 | 1 | $23,453 | 7 |
| 78 | Pocahontas | A | 11 | 0 | $0 | 7 |
| 79 | Sac | A | 11 | 0 | $0 | 6 |
| 80 | Sioux | A | 11 | 2 | $245,262 | 6 |
| 81 | Union | A | 11 | 0 | $0 | 7 |
| 82 | Wayne | A | 11 | 0 | $0 | 6 |
| 83 | Winnebago | A | 11 | 0 | $0 | 6 |
| 84 | Worth | A | 11 | 0 | $0 | 6 |
| 85 | Shelby | A | 11 | 0 | $0 | 7 |
| 86 | Jefferson | A | 11 | 0 | $0 | 7 |
| 87 | Van Buren | A | 11 | 0 | $0 | 7 |
| 88 | Warren | A | 11 | 0 | $0 | 7 |
| 89 | Cerro Gordo | A | 11 | 1 | $14,633 | 7 |
| 90 | Clarke | A | 11 | 0 | $0 | 7 |
| 91 | Story | A | 11 | 0 | $0 | 7 |
| 92 | Scott | A | 10 | 13 | $423,044 | 12 |
| 93 | Adair | A | 10 | 0 | $0 | 5 |
| 94 | Calhoun | A | 10 | 0 | $0 | 5 |
| 95 | Guthrie | A | 10 | 0 | $0 | 5 |
| 96 | O'Brien | A | 10 | 0 | $0 | 5 |
| 97 | Grundy | A | 10 | 0 | $0 | 5 |
| 98 | Poweshiek | A | 10 | 0 | $0 | 5 |
| 99 | Washington | A | 10 | 0 | $0 | 5 |
| 100 | Taylor | A | 9 | 0 | $0 | 3 |