| Index | O'Fallon | Illinois | National |
| Median home price | $214,600 | $174,800 | $184,700 |
| Median rent asked | $1,134 | $925 | $949 |
| Avg. people per household | 2.4 | 2.6 | 2.6 |
| Owner occupied households | 71.8% | 66.0% | 63.6% |
| Renter occupied households | 28.2% | 34.0% | 36.4% |
| Population | Home Price | National Avg. | |
| Rentchler, IL | 4 | $0 | 100% |
| Scott AFB, IL | 3,845 | $0 | 100% |
| Brooklyn, IL | 428 | $31,400 | 83% |
| Washington Park, IL | 3,909 | $32,900 | 82% |
| Madison, IL | 2,941 | $43,800 | 76% |
| O'Fallon, IL | 29,487 | $214,600 | 16% |
| Population | Home Price | National Avg. | |
| Crofton, MD | 29,482 | $394,000 | 113% |
| Austintown, OH | 29,467 | $101,900 | 45% |
| Suisun City, CA | 29,459 | $381,000 | 106% |
| Canton, GA | 29,459 | $237,800 | 29% |
| Seguin, TX | 29,458 | $143,800 | 22% |
| O'Fallon, IL | 29,487 | $214,600 | 16% |
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