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.
| Name | County | Housing Affordability Index | |
|---|---|---|---|
| 1. | Lewistown Heights Census Designated Place | Fergus | 272 |
| 2. | Saint Pierre Census Designated Place | Hill | 226 |
| 3. | Sangrey Census Designated Place | Hill | 224 |
| 4. | Town of Medicine Lake | Sheridan | 213 |
| 5. | Town of Westby | Sheridan | 208 |
| 6. | Hays Census Designated Place | Blaine | 201 |
| 7. | Rocky Boy's Agency Census Designated Place | Hill | 195 |
| 8. | Town of Richey | Dawson | 186 |
| 9. | City of Poplar | Roosevelt | 185 |
| 10. | Town of Sunburst | Toole | 181 |
| 11. | Camp Three Census Designated Place | Musselshell | 166 |
| 12. | City of Colstrip | Rosebud | 163 |
| 13. | Bonner-West Riverside Census Designated Place | Missoula | 162 |
| 14. | City of Wolf Point | Roosevelt | 161 |
| 15. | Town of Wibaux | Wibaux | 160 |
| 16. | Fort Belknap Agency Census Designated Place | Blaine | 159 |
| 17. | City of Baker | Fallon | 157 |
| 18. | City of Plentywood | Sheridan | 152 |
| 19. | Saint Marie Census Designated Place | Valley | 152 |
| 20. | City of Harlem | Blaine | 151 |