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. | Oglala Lakota County | 350 |
| 2. | Sanborn County | 306 |
| 3. | Jackson County | 291 |
| 4. | McPherson County | 291 |
| 5. | Lyman County | 286 |
| 6. | Campbell County | 273 |
| 7. | Aurora County | 272 |
| 8. | Hutchinson County | 272 |
| 9. | Hyde County | 271 |
| 10. | Dewey County | 270 |
| 11. | Douglas County | 269 |
| 12. | Bon Homme County | 264 |
| 13. | Ziebach County | 259 |
| 14. | Jerauld County | 258 |
| 15. | Mellette County | 257 |
| 16. | Spink County | 256 |
| 17. | Gregory County | 253 |
| 18. | Walworth County | 252 |
| 19. | Miner County | 252 |
| 20. | Edmunds County | 249 |
