| Index | San Mar | Maryland | National |
| Median home price | $418,996 | $517,567 | $326,622 |
| Median rent asked | $0 | $1,931 | $1,444 |
| Avg. people per household | 1.1 | 2.6 | 2.6 |
| Owner occupied households | 100.0% | 66.5% | 63.6% |
| Renter occupied households | 0.0% | 33.5% | 36.4% |

| Population | Home Price | National Avg. | |
| Kemps Mill, MD | 0 | $0 | 100% |
| Reid, MD | 0 | $0 | 100% |
| Antietam, MD | 47 | $0 | 100% |
| Eakles Mill, MD | 0 | $0 | 100% |
| Trego-Rohrersville Station, MD | 105 | $0 | 100% |
| San Mar, MD | 327 | $418,996 | 28% |
| Population | Home Price | National Avg. | |
| East Glacier Park Village, MT | 327 | $213,603 | 35% |
| Ben Avon Heights, PA | 327 | $642,841 | 97% |
| Clarendon, PA | 327 | $127,583 | 61% |
| Port William, OH | 327 | $140,149 | 57% |
| Woodville, GA | 327 | $106,272 | 67% |
| San Mar, MD | 327 | $418,996 | 28% |