| City : | Mount Vernon City |
| County : | Buncombe County, Burlington County, Davison County, Huerfano County, Tulsa County, Washington County |
| State : | South Dakota (SD) |
| | |
| Land Area : | 0.35 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 43.7127345 |
| Longitude : | -98.2609514 |
| | |
| Population (2010): | 462 |
| Population Estimate (2012) : | 423 |
| Population Density : | 1,328.52/sq mi |
| Housing Units (2012) : | 205 |
| Median Household Income (2012) : | $55,000 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $63,542 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $63,300 (South Dakota : $129,800, USA : $181,400) |