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.
| ZIP Code | City | Housing Affordability Index | |
|---|---|---|---|
| 1. | 59527 | Hays | 233 |
| 2. | 59247 | Medicine Lake | 232 |
| 3. | 59219 | Dagmar | 222 |
| 4. | 59275 | Westby | 215 |
| 5. | 59526 | Harlem | 190 |
| 6. | 59454 | Kevin | 186 |
| 7. | 59482 | Sunburst | 183 |
| 8. | 59255 | Poplar | 172 |
| 9. | 59521 | Box Elder | 171 |
| 10. | 59323 | Colstrip | 163 |
| 11. | 59259 | Richey | 152 |
| 12. | 59254 | Plentywood | 147 |
| 13. | 59353 | Wibaux | 146 |
| 14. | 59252 | Outlook | 140 |
| 15. | 59043 | Lame Deer | 140 |
| 16. | 59318 | Brusett | 136 |
| 17. | 59542 | Turner | 135 |
| 18. | 59201 | Wolf Point | 134 |
| 19. | 59531 | Joplin | 131 |
| 20. | 59442 | Fort Benton | 131 |