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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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Sweetwater County ZIP Codes

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

County State ZIP Code City Area Codes
Sweetwater County WY 82322 Bairoil 307
Sweetwater County WY 82336 Wamsutter 307
Sweetwater County WY 82901 Rock Springs 307, 435, 970
Sweetwater County WY 82902 Rock Springs 307
Sweetwater County WY 82929 Little America 307
Sweetwater County WY 82932 Farson 307
Sweetwater County WY 82934 Granger 307
Sweetwater County WY 82935 Green River 307
Sweetwater County WY 82938 Mc Kinnon 307, 435
Sweetwater County WY 82942 Point Of Rocks 307
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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.