ZIP Code 20877

ZIP code 20877 is classified by USPS as a standard delivery area and covers roughly 14.9 square miles in Gaithersburg, Montgomery County, Maryland. The area is home to 34,321 residents, producing a population density of 2,296 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 20877 against Maryland and the nation.

On the economic side, the median household income for ZIP 20877 sits at $92,800 (19% below the Maryland average), while per-capita income is $38,973. The poverty rate stands at 12.0% and the unemployment rate at 6.2%. On housing, the median home value is $474,800 (6% above the state average) with median rent at $1,887 per month, and 43.1% of occupied units are owner-occupied, a direct signal of whether 20877 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 33.4% of adults hold a bachelor's degree or higher, the median age is 36.8, and the average commute is 31 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Montgomery County, so you can benchmark 20877 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →