10 Most Populated ZIP Codes in Maryland

The top ZIP code for population in Maryland is 20906 (Silver Spring, Montgomery County), with a population of 71,216. Across the top 10 most populated ZIP codes in Maryland, population ranges from 71,216 to 56,453, covering communities from Silver Spring to Germantown.

Rank	ZIP	City	County	Population	Population
1	20906	Silver Spring	Montgomery County	71,216	71,216
2	20878	Gaithersburg	Montgomery County	65,236	65,236
3	21234	Parkville	Baltimore County	65,010	65,010
4	21740	Hagerstown	Washington County	63,140	63,140
5	20874	Germantown	Montgomery County	62,233	62,233
6	21122	Pasadena	Anne Arundel County	61,589	61,589
7	21117	Owings Mills	Baltimore County	61,337	61,337
8	21222	Dundalk	Baltimore County	58,935	58,935
9	20904	Silver Spring	Montgomery County	57,244	57,244
10	21061	Glen Burnie	Anne Arundel County	56,453	56,453

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Maryland. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Maryland

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