Natrona County Wyoming is covered by a total of 15 ZIP Codes. There are 3 ZIP Codes in Natrona County that extend into adjacent counties (Carbon County, Converse County, and Johnson County). Of the ZIP codes within or partially within Natrona County there are 10 Standard ZIP Codes and 5 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Natrona County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Casper | Standard | |||
| Casper | PO Box | |||
| Casper | Standard | |||
| Casper | PO Box | |||
| Casper | Standard | |||
| Alcova | Standard | |||
| Arminto | Standard | |||
| Edgerton | PO Box | |||
| Evansville | Standard | |||
| Hiland | Standard | |||
| Kaycee | Standard | |||
| Midwest | Standard | |||
| Mills | PO Box | |||
| Natrona | Standard | |||
| Powder River | PO Box |