Maryland Zip Codes

Annapolis has the most zip codes in Anne Arundel County Maryland – 21401, 21405, 21402, 21411, 21403, 21412 and 21404.

Glen Burnie, Hanover and Pasadena are the other post offices with more than one zip code in this county.

In Baltimore County, Baltimore Post Office has 6 zip codes – 21250, 21282, 21251, 21284, 21252 and 21285.

Lutherville Timonium and Towson are other post offices which have more than a single zip code in the county.

In Frederick County, Frederick Post Office is the only one with more than one zip code – 21701, 21704, 21702, 21705, 21703 and 21709. There are 9 zip codes in Garrett County, Maryland.

Maryland Zip Codes Allegany Zip Code Anne Arundel Zip Code Baltimore Zip Code Baltimore City Zip Code Calvert Zip Code Caroline Zip Code Carroll Zip Code Cecil Zip Code Charles Zip Code Dorchester Zip Code Frederick Zip Code Garrett Zip Code Harford Zip Code Howard Zip Code Kent Zip Code Montgomery Zip Code Prince Georges Zip Code Queen Annes Zip Code Somerset Zip Code St Marys Zip Code Talbot Zip Code Washington Zip Code Wicomico Zip Code Worcester Zip Code