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. | City of Grand Tower | Jackson | 350 |
| 2. | City of Mound City | Pulaski | 350 |
| 3. | Village of Hodgkins | Cook | 350 |
| 4. | City of Park City | Lake | 350 |
| 5. | Village of Cutler | Perry | 315 |
| 6. | City of Wamac | Clinton | 314 |
| 7. | City of Sumner | Lawrence | 312 |
| 8. | Village of Plymouth | Hancock | 311 |
| 9. | Village of Washington Park | St. Clair | 303 |
| 10. | Village of West City | Franklin | 299 |
| 11. | Village of Brooklyn | St. Clair | 299 |
| 12. | Village of De Pue | Bureau | 299 |
| 13. | Village of Little York | Warren | 293 |
| 14. | Village of Kansas | Edgar | 290 |
| 15. | Village of Vermont | Fulton | 288 |
| 16. | Dundas Census Designated Place | Richland | 285 |
| 17. | Village of Hindsboro | Douglas | 277 |
| 18. | Village of Irvington | Washington | 274 |
| 19. | City of Cairo | Alexander | 268 |
| 20. | Village of Parkersburg | Richland | 268 |