| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Alcova, Natrona | 82620 |
| Postal/ZIP Codes in Allendale, Natrona | 82609 |
| Postal/ZIP Codes in Arminto, Natrona | 82630 |
| Postal/ZIP Codes in Bar Nunn, Natrona | 82601 |
| Postal/ZIP Codes in Casper, Natrona | 82601, 82602, 82604, 82605, 82609 |
| Postal/ZIP Codes in Edgerton, Natrona | 82635 |
| Postal/ZIP Codes in Evansville, Natrona | 82636 |
| Postal/ZIP Codes in Hiland, Natrona | 82638 |
| Postal/ZIP Codes in Midwest, Natrona | 82643 |
| Postal/ZIP Codes in Mills, Natrona | 82604, 82644 |
| Postal/ZIP Codes in Moneta, Natrona | 82638 |
| Postal/ZIP Codes in Natrona, Natrona | 82646 |
| Postal/ZIP Codes in Powder River, Natrona | 82648 |