Frequently Asked Questions About ZIP Code 98138
98138 ZIP Code FAQs and quick facts
1
What region of the U.S. is ZIP Code 98138 associated with?
The 98138 ZIP Code is primarily associated with Seattle, WA in the United States.
2
What U.S. county is ZIP Code 98138 located in?
The 98138 ZIP Code is located in King County in the state of Washington.
3
What type of ZIP Code is 98138?
The U.S. ZIP Code 98138 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. 98138, are dedicated solely to delivery of mail to P.O. Boxes.
4
What are demographics for ZIP Code 98138?
A ZIP Code must be a standard U.S. ZIP Code to have demographics data available. Because ZIP Code 98138 is a P.O. Box-only ZIP Code, demographics data is not available.
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