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Wyoming Zip Codes



Wyoming Wyoming is a state in the mountain region of the Western United States. is the 10th most extensive, but the least populous and the 2nd least densely populated of the 50 States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High Plains. Cheyenne is the capital and the most populous city of with a population of nearly 60,000 people within its city proper.

State Zip Code City County Area Codes
WY 82515 Hudson Fremont County 307
WY 82516 Kinnear Fremont County 307
WY 82520 Lander Fremont County 307
WY 82523 Pavillion Fremont County 307
WY 82524 Saint Stephens Fremont County 307
WY 82601 Casper Natrona County 307
WY 82602 Casper Natrona County 307
WY 82604 Casper Natrona County 307
WY 82605 Casper Natrona County 307
WY 82609 Casper Natrona County 307
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Map of Wyoming

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.

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