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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Mason County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Mason County.

County State ZIP Code City Area Codes
Mason County WA 98560 Matlock 360, 564
Mason County WA 98584 Shelton 253, 360, 564
Mason County WA 98588 Tahuya 360, 564
Mason County WA 98592 Union 360, 564
Mason County WV 25106 Henderson 220, 304, 681, 740
Mason County WV 25123 Leon 304, 681
Mason County WV 25187 Southside 304, 681
Mason County WV 25247 Hartford 220, 304, 681, 740
Mason County WV 25253 Letart 220, 304, 681, 740
Mason County WV 25260 Mason 220, 304, 681, 740
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.