U.S. postal lookup

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.

42,735 verified records

All states and U.S. territories

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State directory

Wyoming ZIP Codes

Complete postal directory, details, and geographic map for the State of Wyoming.

State	ZIP Code	City	County	Area Codes
WY	82729	Sundance	Crook County	`307`
WY	82730	Upton	Weston County	`307`
WY	82731	Weston	Campbell County	`307`
WY	82732	Wright	Campbell County	`307`
WY	82801	Sheridan	Sheridan County	`307, 406`
WY	82831	Arvada	Sheridan County	`307, 406`
WY	82832	Banner	Sheridan County	`307`
WY	82833	Big Horn	Sheridan County	`307`
WY	82834	Buffalo	Johnson County	`307`
WY	82835	Clearmont	Sheridan County	`307`

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Geographic Map of Wyoming

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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.