| 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. | |
| Mercersville, MD | 195 | $0 | 100% |
| Pondsville, MD | 40 | $0 | 100% |
| Antietam, MD | 47 | $0 | 100% |
| Eakles Mill, MD | 0 | $0 | 100% |
| Trego-Rohrersville Station, MD | 105 | $0 | 100% |
| Mount Briar, MD | 121 | $0 | 100% |
| Population | Home Price | National Avg. | |
| Hainesburg, NJ | 121 | $630,573 | 93% |
| Lloyd, FL | 121 | $115,999 | 64% |
| Reed, AR | 121 | $81,835 | 75% |
| Meriden, IA | 121 | $160,361 | 51% |
| Pie Town, NM | 121 | $0 | 100% |
| Mount Briar, MD | 121 | $0 | 100% |