| Index | Mount Briar | Maryland | National |
| Median home price | $0 | $517,567 | $326,622 |
| Median rent asked | $0 | $1,931 | $1,444 |
| 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. | |
| Antietam, MD | 47 | $0 | 100% |
| Eakles Mill, MD | 0 | $0 | 100% |
| Trego-Rohrersville Station, MD | 105 | $0 | 100% |
| Brownsville, MD | 27 | $0 | 100% |
| Gapland, MD | 62 | $0 | 100% |
| Mount Briar, MD | 121 | $0 | 100% |
| Population | Home Price | National Avg. | |
| Primrose, AK | 121 | $716,211 | 119% |
| Pine Lake, AZ | 121 | $308,343 | 6% |
| Tony, WI | 121 | $185,357 | 43% |
| Chalkyitsik, AK | 121 | $52,631 | 84% |
| Matlock, IA | 121 | $143,744 | 56% |
| Mount Briar, MD | 121 | $0 | 100% |