ZIP Code 20899

ZIP code 20899 is classified by USPS as a standard delivery area and covers roughly 0.2 square miles in Gaithersburg, Montgomery County, Maryland. The area is home to 142 residents, producing a population density of 694 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 20899 against Maryland and the nation.

On the economic side, the median household income for ZIP 20899 sits at $24,417 (79% below the Maryland average), while per-capita income is $27,240. The poverty rate stands at 0.0% and the unemployment rate at 53.1%. On housing, the median home value is — with median rent at $788 per month, and 0.0% of occupied units are owner-occupied, a direct signal of whether 20899 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 0.0% of adults hold a bachelor's degree or higher, the median age is 62.8, and the average commute is —. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Montgomery County, so you can benchmark 20899 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 →