About 20405 - Washington, District of Columbia
20405 is a mid-sized ZIP code covering Washington in District of Columbia, the United States. This area falls under Washington County County.
Around 19,100 people live in the 20405 ZIP code area. This is roughly in line with the District of Columbia average of about 22,323 residents.
Median household income is about $105,700 (near the District of Columbia average).
This ZIP code sits alongside neighboring areas like Washington within District of Columbia.