Frequently Asked Questions About ZIP Code 21139
FAQs and quick facts about ZIP Code 21139
What region of the U.S. is ZIP Code 21139 associated with?
The 21139 ZIP Code is primarily associated with Riderwood, MD in the United States.
What U.S. county is ZIP Code 21139 located in?
The 21139 ZIP Code is located in Baltimore County in the state of Maryland.
What type of ZIP Code is 21139?
The U.S. ZIP Code 21139 is a P.O. Box-only ZIP Code. P.O. Box-only ZIP Code are those used only for Post Office (P.O.) Boxes at a given USPS facility. Some ZIP Codes, e.g. 21139, are dedicated solely to delivery of mail to P.O. Boxes.
What are demographics for ZIP Code 21139?
A ZIP Code must be a standard U.S. ZIP Code to have demographics data available. Because ZIP Code 21139 is a P.O. Box-only ZIP Code, demographics data is not available.
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