Wyoming ZIP codes
Wyoming holds 195 ZIP codes between 82001 and 83414. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in Wyoming
| Place | ZIP codes |
|---|---|
| Cheyenne | 8 |
| Casper | 5 |
| Laramie | 4 |
| Gillette | 3 |
| Rock Springs | 2 |
| Jackson | 2 |
| Evanston | 2 |
| Bosler | 1 |
| Buford | 1 |
| Centennial | 1 |
| Garrett | 1 |
| Jelm | 1 |
| Rock River | 1 |
| Tie Siding | 1 |
| Basin | 1 |
| Burlington | 1 |
| Byron | 1 |
| Cowley | 1 |
| Deaver | 1 |
| Emblem | 1 |
Wyoming counties by ZIP count
| County | ZIP codes |
|---|---|
| Laramie | 17 |
| Lincoln | 16 |
| Natrona | 14 |
| Fremont | 13 |
| Big Horn | 12 |
| Carbon | 12 |
| Sheridan | 12 |
| Sweetwater | 12 |
| Albany | 11 |
| Goshen | 9 |
Reading a Wyoming ZIP code
Wyoming holds 195 ZIP codes between 82001 and 83414, spread over 23 counties. Cheyenne leads the state with 8 codes, ahead of Casper with 5. Every code here opens with the digit 8: that opening number is the national postal region Wyoming belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Cheyenne spreads across 8 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for Wyoming; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources