| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 82601 | Casper | Natrona County | Standard |
| 82602 | Casper | Natrona County | PO Box |
| 82604 | Casper | Natrona County | Standard |
| 82605 | Casper | Natrona County | PO Box |
| 82609 | Casper | Natrona County | Standard |
| 82620 | Alcova | Natrona County | Standard |
| 82630 | Arminto | Natrona County | Standard |
| 82635 | Edgerton | Natrona County | PO Box |
| 82636 | Evansville | Natrona County | Standard |
| 82638 | Hiland | Natrona County | Standard |
| 82639 | Kaycee | Johnson County | Standard |
| 82643 | Midwest | Natrona County | Standard |
| 82644 | Mills | Natrona County | PO Box |
| 82646 | Natrona | Natrona County | Standard |
| 82648 | Powder River | Natrona County | PO Box |