There are 12 zip codes in Natrona County, Wyoming. The most populated is 82604, located in Casper. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
8260427,492Casper
8260126,973Casper
8260918,567Casper
826363,903Evansville
826441,739Mills
82620226Alcova
82643205Midwest
82635116Edgerton
82638115Hiland
82648114Powder River
8264626Natrona
826300Arminto

Zip Codes in Natrona County, Wyoming by Population (2024)