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U.S. ZIP Codes Database 2026

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Natrona County ZIP Codes

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

County State ZIP Code City Area Codes
Natrona County WY 82601 Casper 307
Natrona County WY 82602 Casper 307
Natrona County WY 82604 Casper 307
Natrona County WY 82605 Casper 307
Natrona County WY 82609 Casper 307
Natrona County WY 82620 Alcova 307
Natrona County WY 82630 Arminto 307
Natrona County WY 82635 Edgerton 307
Natrona County WY 82636 Evansville 307
Natrona County WY 82638 Hiland 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.