ZIP Code 21664

ZIP code 21664 is classified by USPS as a standard delivery area and covers roughly 1.1 square miles in Secretary, Dorchester County, Maryland. The area is home to 539 residents, producing a population density of 481 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 21664 against Maryland and the nation.

On the economic side, the median household income for ZIP 21664 sits at $82,721 (28% below the Maryland average), while per-capita income is $29,251. The poverty rate stands at 5.5% and the unemployment rate at 6.7%. On housing, the median home value is $172,000 (62% below the state average) with median rent at $1,175 per month, and 70.0% of occupied units are owner-occupied, a direct signal of whether 21664 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 20.3% of adults hold a bachelor's degree or higher, the median age is 34, and the average commute is —. We also surface 6 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Dorchester County, so you can benchmark 21664 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 →