| City : | Black Rock City |
| County : | Grady County, Lawrence County, Mcclain County, San Juan County |
| State : | Arkansas (AR) |
| | |
| Land Area : | 3.20 sq mi |
| Water Area : | 0.14 sq mi |
| Latitude : | 36.1062173 |
| Longitude : | -91.1074750 |
| | |
| Population (2010): | 662 |
| Population Estimate (2012) : | 618 |
| Population Density : | 206.56/sq mi |
| Housing Units (2012) : | 309 |
| Median Household Income (2012) : | $31,250 (Arkansas : $40,531, USA : $53,046) |
| Median Family Income (2012) : | $31,250 (Arkansas : $50,453, USA : $64,585) |
| Median House Price (2012) : | $58,700 (Arkansas : $106,300, USA : $181,400) |