About 20557 - Washington, District of Columbia
20557 is a mid-sized ZIP code covering Washington in District of Columbia, the United States. This area falls under Washington County County.
Washington has a reported population of 11,825. It's a quieter, less populous area than the typical District of Columbia ZIP code (avg. ~22,323).
Median household income is about $85,600 (near the District of Columbia average).
This ZIP code sits alongside neighboring areas like Washington within District of Columbia.