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ZIP codes in Okanogan County, Washington

Okanogan County, Washington has 19 ZIP codes in this list, from 98812 to 99155. They cover 19 places, among them Brewster, Carlton, Conconully and Loomis.

The ZIP code areas of Okanogan County add up to about 4,907 square miles of land (12,710 sq km) as the Census Bureau draws them. The largest is 98855 (Tonasket), with 632 square miles.

Using these codes

Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.

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