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. | Sheridan County | 166 |
| 2. | Wibaux County | 146 |
| 3. | Blaine County | 132 |
| 4. | Roosevelt County | 127 |
| 5. | Petroleum County | 125 |
| 6. | Garfield County | 123 |
| 7. | Liberty County | 118 |
| 8. | McCone County | 117 |
| 9. | Rosebud County | 114 |
| 10. | Powder River County | 112 |
| 11. | Fallon County | 110 |
| 12. | Big Horn County | 105 |
| 13. | Chouteau County | 103 |
| 14. | Daniels County | 103 |
| 15. | Toole County | 101 |
| 16. | Dawson County | 100 |
| 17. | Treasure County | 96 |
| 18. | Glacier County | 95 |
| 19. | Fergus County | 93 |
| 20. | Hill County | 93 |