Baltimore, MD 21231
Postal code in Baltimore, Maryland
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ZIP code 21231 is located in northern Maryland and covers a slightly less than average land area compared to other ZIP codes in the United States. It also has ...
Zip code 21231 is located mostly in Baltimore City County, MD. This postal code encompasses addresses in the city of Baltimore, MD. Find directions to 21231, ...
21231 Rankings. Niche ranks thousands of places to live based on key statistics from the U.S. Census and expert insights. Best ZIP Codes to Live in Maryland.