The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
| County | Housing Affordability Index | |
|---|---|---|
| 1. | Johnson County | 131 |
| 2. | Story County | 138 |
| 3. | Dickinson County | 150 |
| 4. | Madison County | 156 |
| 5. | Scott County | 162 |
| 6. | Warren County | 165 |
| 7. | Dubuque County | 165 |
| 8. | Dallas County | 167 |
| 9. | Pottawattamie County | 168 |
| 10. | Winneshiek County | 169 |
| 11. | Black Hawk County | 169 |
| 12. | Polk County | 170 |
| 13. | Jefferson County | 176 |
| 14. | Jones County | 178 |
| 15. | Linn County | 180 |
| 16. | Plymouth County | 180 |
| 17. | Marion County | 181 |
| 18. | Benton County | 181 |
| 19. | Mills County | 182 |
| 20. | Poweshiek County | 182 |
