| County | # of
Listings | Most
Recent
Report | Last
Posted | | Adair | | | |
| Adams | | | |
| Allamakee | | | |
| Appanoose | | | |
| Audubon | | | |
| Benton | | | |
| Black Hawk | | | |
| Boone | 3 | 4-2014 | 4-2014 |
| Bremer | | | |
| Buchanan | 2 | 8-2013 | 2-2018 |
| Buena Vista | | | |
| Butler | | | |
| Calhoun | | | |
| Carroll | | | |
| Cass | | | |
| Cedar | | | |
| Cerro Gordo | | | |
| Cherokee | | | |
| Chickasaw | 1 | 6-2017 | 11-2017 |
| Clarke | | | |
| Clay | | | |
| Clayton | 2 | 9-1970 | 9-2014 |
| Clinton | | | |
| Crawford | | | |
| Dallas | 6 | 7-2012 | 9-2014 |
| Davis | | | |
| Decatur | 3 | 5-2008 | 1-2009 |
| Delaware | 2 | | 3-1980 |
| Des Moines | | | |
| Dickinson | 1 | 2-2013 | 3-2014 |
| Dubuque | 7 | 11-2015 | 9-2023 |
| Emmet | | | |
| Fayette | 2 | 10-2006 | 11-2008 |
| Floyd | 1 | 8-1977 | 4-2004 |
| Franklin | 1 | 9-2001 | 4-2004 |
| Fremont | 1 | 6-2013 | 2-2018 |
| Greene | 1 | 7-1983 | 12-2001 |
| Grundy | | | |
| Guthrie | | | |
| Hamilton | 2 | 11-2000 | 12-2001 |
| Hancock | | | |
| Hardin | 1 | 5-2015 | 8-2015 |
| Harrison | | | |
| Henry | | | |
| Howard | | | |
| Humboldt | 9 | 2-2011 | 6-2012 |
| Ida | | | |
| Iowa | | | |
| Jackson | | | |
| Jasper | 2 | 10-2012 | 4-2018 |
| | County | # of
Listings | Most
Recent
Report | Last
Posted | | Jefferson | 4 | 10-1975 | 3-2009 |
| Johnson | 2 | 4-2010 | 11-2012 |
| Jones | | | |
| Keokuk | 1 | 6-2010 | 10-2010 |
| Kossuth | | | |
| Lee | 3 | 4-2007 | 8-2011 |
| Linn | | | |
| Louisa | | | |
| Lucas | | | |
| Lyon | | | |
| Madison | 1 | 11-2007 | 7-2008 |
| Mahaska | 1 | | 6-2018 |
| Marion | 1 | 10-2000 | 11-2000 |
| Marshall | | | |
| Mills | | | |
| Mitchell | | | |
| Monona | | | |
| Monroe | 1 | 1-1976 | 5-2003 |
| Montgomery | | | |
| Muscatine | | | |
| O'brien | | | |
| Osceola | | | |
| Page | | | |
| Palo Alto | | | |
| Plymouth | | | |
| Pocahontas | | | |
| Polk | 3 | 2-2000 | 1-2024 |
| Pottawattamie | 1 | 12-1999 | 12-2001 |
| Poweshiek | | | |
| Ringgold | | | |
| Sac | 1 | 7-2013 | 8-2017 |
| Scott | 3 | 7-1989 | 4-2010 |
| Shelby | | | |
| Sioux | | | |
| Story | | | |
| Tama | | | |
| Taylor | | | |
| Union | | | |
| Van Buren | | | |
| Wapello | | | |
| Warren | 1 | 11-1982 | 3-2018 |
| Washington | 1 | 11-2006 | 2-2009 |
| Wayne | | | |
| Webster | | | |
| White | | | |
| Winnebago | | | |
| Winneshiek | 4 | 10-2010 | 4-2011 |
| Woodbury | 3 | 8-1997 | 4-2010 |
| Worth | | | |
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