USA
> District of Columbia > Zip Code 20001
| Zip Code : | 20001 |
| City : | Washington city |
| County : | District of Columbia |
| State : | District of Columbia (DC) |
| Land Area : | 2.18 sq mi |
| Water Area : | 0.06 sq mi |
| Latitude : | 38.9103532 |
| Longitude : | -77.0177386 |
| Population (2010): | 38,551 |
| Population Estimate (2012) : | 38,570 |
| Population Density : | 17,688.96/sq mi |
| Housing Units (2012) : | 18,751 |
| Median Household Income (2012) : | $76,620 (District of Columbia : $64,267, USA : $53,046) |
| Median Family Income (2012) : | $85,467 (District of Columbia : $78,993, USA : $64,585) |
| Median House Price (2012) : | $490,600 (District of Columbia : $443,000, USA : $181,400) |