About 20551 - Washington, District of Columbia
ZIP code 20551 covers the community of Washington in District of Columbia, the United States. This area falls under Washington County County.
Census data puts the population of this ZIP code at 19,892 residents. This is roughly in line with the District of Columbia average of about 22,323 residents.
Median household income is about $109,200 (near the District of Columbia average).
Other ZIP code codes in District of Columbia serve areas such as Washington.