| Zip Code : | 63020 |
| City : | De Soto city, Hillsboro city, Olympian Village city |
| County : | Washington County, Jefferson County |
| State : | Missouri (MO) |
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| Land Area : | 141.55 sq mi |
| Water Area : | 0.63 sq mi |
| Latitude : | 38.1009709 |
| Longitude : | -90.5655494 |
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| Population (2010): | 20,714 |
| Population Estimate (2012) : | 20,781 |
| Population Density : | 146.34/sq mi |
| Housing Units (2012) : | 8,643 |
| Median Household Income (2012) : | $45,930 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $52,720 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $127,400 (Missouri : $138,400, USA : $181,400) |