Casper, Wyoming ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
72,922 - Counties represented
1 - Population range
18,714–27,487 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 82604 | Casper | Natrona | 27,487 |
| 2 | 82601 | Casper | Natrona | 26,721 |
| 3 | 82609 | Casper | Natrona | 18,714 |
Counties represented
All ZIP Codes in Casper
Browse all ZIP data for Wyoming
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.