Home USA »City Population« Change Measure Top City of the District of Columbia by Population Washington Population: 671,803 2022-07-01 Area: 158.32 km² 61.13 mi² Density: 4,243 inh./km² 10,990 inh./mi² Growth: -1.2% per year Related pages on »City Population« Washington city Washington - Arlington urban area District of Columbia federal district Washington - Baltimore - Arlington combined statistical area Washington - Arlington - Alexandria metropolitan statistical area