Year Built

Maryland contains 605 ZIP codes across 24 counties. With an estimated population of 6,170,363 residents and a median age of 39.71 years, it is a middle-aged state in terms of demographics.

Economically, Maryland is broadly a upper-middle-income state. The median household income of $108,948 is above the national average. The statewide unemployment rate is 4.9%, near the national average. Approximately 9.2% of residents live below the poverty line.

Maryland has a premium housing market overall, with a median home value of $424,931 — significantly above the national average. Median monthly rent across the state averages around $1,738. Homeownership stands at 68.2% statewide.

The population of Maryland is racially diverse, with White as the largest group at 47.4%. Residents are broadly well-educated — 51.0% hold a bachelor's degree or higher, above the national average.

The 605 ZIP codes across Maryland vary widely in character — from dense urban cores to rural agricultural areas. Each of the 24 counties has its own economic profile, housing market, and demographic makeup. Browse by county below to find ZIP codes that match your specific needs, whether you're researching relocation, real estate, business demographics, or local government boundaries.

Looking for ZIP code data in Maryland? Every ZIP code page includes population counts, median household income, home values, rental rates, age distribution, race and ethnicity breakdown, education levels, commute data, and housing stock information — all sourced from the U.S. Census Bureau's American Community Survey.