| City : | Watertown City |
| County : | Codington County, Jefferson County, Osage County, Tulsa County, Ward County |
| State : | South Dakota (SD) |
| | |
| Land Area : | 17.45 sq mi |
| Water Area : | 7.59 sq mi |
| Latitude : | 44.9089029 |
| Longitude : | -97.1559615 |
| | |
| Population (2010): | 21,482 |
| Population Estimate (2012) : | 21,524 |
| Population Density : | 1,231.32/sq mi |
| Housing Units (2012) : | 10,050 |
| Median Household Income (2012) : | $43,815 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $59,659 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $133,000 (South Dakota : $129,800, USA : $181,400) |