| City : | San Mar |
| County : | Neosho County, Payne County, Washington County |
| State : | Maryland (MD) |
| | |
| Land Area : | 0.45 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 39.5523516 |
| Longitude : | -77.6407482 |
| | |
| Population (2010): | 384 |
| Population Estimate (2012) : | 348 |
| Population Density : | 849.69/sq mi |
| Housing Units (2012) : | 144 |
| Median Household Income (2012) : | $56,875 (Maryland : $72,999, USA : $53,046) |
| Median Family Income (2012) : | $65,221 (Maryland : $88,092, USA : $64,585) |
| Median House Price (2012) : | $258,800 (Maryland : $304,900, USA : $181,400) |