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| County | Formed | County Seat | Contact |
| Adair | 1851 | Greenfield | Adopt Me |
| Adams | 1851 | Corning | Adopt Me |
| Allamakee | 1847 | Waukon | Adopt Me |
| Appanoose | 1843 | Centerville | Adopt Me |
| Audubon | 1851 | Audubon | Adopt Me |
| Benton | 1837 | Vinton | Adopt Me |
| Black Hawk | 1843 | Waterloo | Adopt Me |
| Boone | 1846 | Boone | Adopt Me |
| Bremer | 1851 | Waverly | Adopt Me |
| Buchanan | 1837 | Independence | Adopt Me |
| Buena Vista | 1851 | Storm Lake | Adopt Me |
| Butler | 1851 | Allison | Adopt Me |
| Calhoun | 1855 | Rockwell City | Adopt Me |
| Carroll | 1851 | Carroll | Adopt Me |
| Cass | 1851 | Atlantic | Adopt Me |
| Cedar | 1837 | Tipton | Adopt Me |
| Cerro Gordo | 1851 | Mason City | Adopt Me |
| Cherokee | 1851 | Cherokee | Adopt Me |
| Chickasaw | 1851 | New Hampton | Adopt Me |
| Clarke | 1846 | Osceola | Adopt Me |
| Clay | 1851 | Spencer | Adopt Me |
| Clayton | 1837 | Elkader | Adopt Me |
| Clinton | 1837 | Clinton | Adopt Me |
| Crawford | 1851 | Denison | Adopt Me |
| Dallas | 1846 | Adel | Adopt Me |
| Davis | 1843 | Bloomfield | Adopt Me |
| Decatur | 1846 | Leon | Adopt Me |
| Delaware | 1837 | Manchester | Adopt Me |
| Des Moines | 1834 | Burlington | Adopt Me |
| Dickinson | 1851 | Spirit Lake | Adopt Me |
| Dubuque | 1834 | Dubuque | Adopt Me |
| Emmet | 1851 | Estherville | Adopt Me |
| Fayette | 1837 | West Union | Adopt Me |
| Floyd | 1851 | Charles City | Adopt Me |
| Franklin | 1851 | Hampton | Adopt Me |
| Fremont | 1847 | Sidney | Adopt Me |
| Greene | 1851 | Jefferson | Adopt Me |
| Grundy | 1851 | Grundy Center | Adopt Me |
| Guthrie | 1851 | Guthrie Center | Adopt Me |
| Hamilton | 1856 | Webster City | Adopt Me |
| Hancock | 1851 | Garner | Adopt Me |
| Hardin | 1851 | Eldora | Adopt Me |
| Harrison | 1851 | Logan | Adopt Me |
| Henry | 1836 | Mount Pleasant | Adopt Me |
| Howard | 1851 | Cresco | Adopt Me |
| Humboldt | 1851 | Dakota City | Adopt Me |
| Ida | 1851 | Ida Grove | Adopt Me |
| Iowa | 1843 | Marengo | Carol Eddleman |
| Jackson | 1837 | Maquoketa | Adopt Me |
| Jasper | 1846 | Newton | Adopt Me |
| Jefferson | 1839 | Fairfield | Adopt Me |
| Johnson | 1837 | Iowa City | Adopt Me |
| Jones | 1837 | Anamosa | Adopt Me |
| Keokuk | 1843 | Sigourney | Adopt Me |
| Kossuth | 1851 | Algona | Adopt Me |
| Lee | 1836 | Fort Madison | Adopt Me |
| Linn | 1837 | Cedar Rapids | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Louisa | 1836 | Wapello | Adopt Me |
| Lucas | 1846 | Chariton | Adopt Me |
| Lyon | 1851 | Rock Rapids | Adopt Me |
| Madison | 1846 | Winterset | Adopt Me |
| Mahaska | 1843 | Oskaloosa | Adopt Me |
| Marion | 1845 | Knoxville | Adopt Me |
| Marshall | 1846 | Marshalltown | Adopt Me |
| Mills | 1851 | Glenwood | Adopt Me |
| Mitchell | 1851 | Osage | Adopt Me |
| Monona | 1851 | Onawa | Adopt Me |
| Monroe | 1843 | Albia | Adopt Me |
| Montgomery | 1851 | Red Oak | Adopt Me |
| Muscatine | 1836 | Muscatine | Adopt Me |
| O'Brien | 1851 | Primghar | Adopt Me |
| Osceola | 1851 | Sibley | Adopt Me |
| Page | 1847 | Clarinda | Adopt Me |
| Palo Alto | 1858 | Emmetsburg | Adopt Me |
| Plymouth | 1851 | Le Mars | Adopt Me |
| Pocahantas | 1851 | Pocahantas | Adopt Me |
| Polk | 1846 | Des Moines | Adopt Me |
| Pottawattamie | 1848 | Council Bluffs | Adopt Me |
| Poweshiek | 1843 | Montezuma | Adopt Me |
| Ringgold | 1847 | Mount Ayr | Adopt Me |
| Sac | 1851 | Sac City | Adopt Me |
| Scott | 1837 | Davenport | Adopt Me |
| Shelby | 1851 | Harlan | Adopt Me |
| Sioux | 1851 | Orange City | Adopt Me |
| Story | 1846 | Nevada | Adopt Me |
| Tama | 1843 | Toledo | Adopt Me |
| Taylor | 1847 | Bedford | Adopt Me |
| Union | 1851 | Creston | Adopt Me |
| Van Buren | 1836 | Keosauqua | Adopt Me |
| Wapello | 1843 | Ottumwa | Adopt Me |
| Warren | 1846 | Indianola | Adopt Me |
| Washington | 1837 | Washington | Adopt Me |
| Wayne | 1846 | Corydon | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Webster | 1851 | Fort Dodge | Adopt Me |
| Winnebago | 1851 | Forest City | Adopt Me |
| Winneshiek | 1847 | Decorah | Adopt Me |
| Woodbury | 1851 | Sioux City | Adopt Me |
| Worth | 1851 | Northwood | Adopt Me |
| Wright | 1851 | Clarion | Adopt Me |