| Index | San Mar | Maryland | National |
| Median home price | $227,000 | $290,400 | $184,700 |
| Median rent asked | $0 | $1,264 | $949 |
| 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. | |
| Yarrowsburg, MD | 274 | $0 | 100% |
| Fort Ritchie, MD | 48 | $0 | 100% |
| Brownsville, MD | 26 | $0 | 100% |
| Gapland, MD | 60 | $0 | 100% |
| Mount Briar, MD | 117 | $0 | 100% |
| San Mar, MD | 318 | $227,000 | 23% |
| Population | Home Price | National Avg. | |
| Cottonwood, TX | 318 | $300,000 | 62% |
| Smithville Flats, NY | 318 | $83,400 | 55% |
| B and E, TX | 318 | $91,500 | 50% |
| Hoytville, OH | 318 | $81,300 | 56% |
| Redvale, CO | 318 | $163,800 | 11% |
| San Mar, MD | 318 | $227,000 | 23% |
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