| Index | St. Mary | Missouri | National |
| Median home price | $77,100 | $141,200 | $184,700 |
| Median rent asked | $608 | $759 | $949 |
| Avg. people per household | 2.5 | 2.4 | 2.6 |
| Owner occupied households | 85.1% | 66.8% | 63.6% |
| Renter occupied households | 14.9% | 33.2% | 36.4% |
| Population | Home Price | National Avg. | |
| Brewer, MO | 466 | $0 | 100% |
| Weingarten, MO | 143 | $0 | 100% |
| Lithium, MO | 88 | $0 | 100% |
| Rockwood, IL | 25 | $60,000 | 68% |
| Ellis Grove, IL | 316 | $65,700 | 64% |
| St. Mary, MO | 261 | $77,100 | 58% |
| Population | Home Price | National Avg. | |
| Custar, OH | 261 | $78,300 | 58% |
| Oakwood Park, MO | 261 | $140,800 | 24% |
| Shamrock Lakes, IN | 261 | $126,100 | 32% |
| Bear Lake village, MI | 261 | $67,000 | 64% |
| Smith Island, MD | 261 | $107,600 | 42% |
| St. Mary, MO | 261 | $77,100 | 58% |
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