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. | Rosebud County | 254 |
| 2. | Big Horn County | 240 |
| 3. | Fallon County | 231 |
| 4. | Liberty County | 226 |
| 5. | Prairie County | 224 |
| 6. | Powder River County | 219 |
| 7. | Wheatland County | 216 |
| 8. | Valley County | 212 |
| 9. | Treasure County | 207 |
| 10. | Sheridan County | 205 |
| 11. | Toole County | 204 |
| 12. | Carter County | 204 |
| 13. | Wibaux County | 203 |
| 14. | Pondera County | 201 |
| 15. | Daniels County | 200 |
| 16. | Fergus County | 191 |
| 17. | Roosevelt County | 190 |
| 18. | Blaine County | 186 |
| 19. | Golden Valley County | 186 |
| 20. | Petroleum County | 185 |
