About 20421 - Washington, District of Columbia
Located in District of Columbia, the United States is home to the densely populated community of Washington, served by ZIP code 20421. It sits within Washington County County.
Washington has a reported population of 44,558. That's noticeably above the average for a District of Columbia ZIP code, which sits near 22,323 people.
Median household income is about $79,900 (below the District of Columbia average).
Other ZIP code codes in District of Columbia serve areas such as Washington.