| Index | Mount Briar | Maryland | National |
| Median home price | $0 | $290,400 | $184,700 |
| Median rent asked | $0 | $1,264 | $949 |
| Avg. people per household | 1.8 | 2.6 | 2.6 |
| Owner occupied households | 69.0% | 66.5% | 63.6% |
| Renter occupied households | 31.0% | 33.5% | 36.4% |
| Population | Home Price | National Avg. | |
| Mercersville, MD | 188 | $0 | 100% |
| Pondsville, MD | 39 | $0 | 100% |
| Antietam, MD | 45 | $0 | 100% |
| Eakles Mill, MD | 0 | $0 | 100% |
| Trego-Rohrersville Station, MD | 101 | $0 | 100% |
| Mount Briar, MD | 117 | $0 | 100% |
| Population | Home Price | National Avg. | |
| Bryce, AZ | 117 | $0 | 100% |
| Sumner, MO | 117 | $56,300 | 70% |
| Republic, KS | 117 | $20,000 | 89% |
| New Pine Creek, OR | 117 | $0 | 100% |
| Shepardsville, IN | 117 | $93,300 | 49% |
| Mount Briar, MD | 117 | $0 | 100% |
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