| 1 Family Structure | 2 Family Structure | 3 Family Structure | 4 Family Structure | 1-4 Family with Business | 5 Family and Up | |
| Gary | 40% | 17% | 10% | 6% | 4% | 22% |
| East Chicago | 41% | 28% | 6% | 3% | 11% | 7% |
| Chicago Heights | 38% | 35% | 6% | 5% | 9% | 7% |
| Whiting | 28% | 26% | 11% | 10% | 10% | 14% |
| Hammond | 59% | 19% | 6% | 4% | 4% | 8% |
| Calumet City | 58% | 21% | 6% | 6% | 5% | 6% |