Wyoming area codes
Wyoming has one area code, 307, for all of Wyoming.
- Area codes
- 1
- Areas
- 1
- Overlay areas
- 0
- Time zone
- Mountain
- ZIP codes
- 195 in Wyoming
Somewhere in Wyoming now? What area code am I in? answers from your location.
Every Wyoming area code
Wyoming area codes by area
Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.
307 — Cheyenne
75 places, the largest 36 here (all of them on 307):
- Cheyenne
- Casper
- Gillette
- Laramie
- Rock Springs
- Sheridan
- Evanston
- Green River
- Riverton
- Jackson
- Cody
- Rawlins
- Lander
- Powell
- Douglas
- Torrington
- Worland
- Buffalo
- Wheatland
- Newcastle
- Kemmerer
- Glenrock
- Afton
- Thermopolis
- Lovell
- Greybull
- Pinedale
- Lyman
- Saratoga
- Wright
- Pine Bluffs
- Lusk
- Basin
- Alpine
- Moorcroft
- Sundance
8 counties:
Area codes of the largest cities in Wyoming
| City | Area codes | Population |
|---|---|---|
| Cheyenne | 307 | 65,239 |
| Casper | 307 | 58,839 |
| Gillette | 307 | 33,431 |
| Laramie | 307 | 32,234 |
| Rock Springs | 307 | 23,127 |
| Sheridan | 307 | 19,285 |
| Evanston | 307 | 11,800 |
| Green River | 307 | 11,581 |
| Riverton | 307 | 10,856 |
| Jackson | 307 | 10,756 |
| Cody | 307 | 10,276 |
| Rawlins | 307 | 8,129 |
| Lander | 307 | 7,432 |
| Powell | 307 | 6,503 |
| Douglas | 307 | 6,420 |
| Torrington | 307 | 6,182 |
| Ranchettes † | 307 | 5,949 |
| Worland | 307 | 4,794 |
| South Greeley † | 307 | 4,631 |
| Buffalo | 307 | 4,572 |
| Mills † | 307 | 4,390 |
| Fox Farm-College † | 307 | 4,019 |
| Wheatland | 307 | 3,550 |
| Newcastle | 307 | 3,348 |
| Bar Nunn † | 307 | 3,008 |
| Kemmerer | 307 | 2,972 |
| Glenrock | 307 | 2,941 |
| Warren AFB † | 307 | 2,936 |
| Afton | 307 | 2,908 |
| Evansville † | 307 | 2,779 |
| Thermopolis | 307 | 2,709 |
| Lovell | 307 | 2,422 |
| North Rock Springs † | 307 | 2,277 |
| South Park † | 307 | 2,093 |
| Greybull | 307 | 2,091 |
| Pinedale | 307 | 2,048 |
| Rozet † | 307 | 2,040 |
| Star Valley Ranch † | 307 | 2,007 |
| Lyman | 307 | 1,858 |
| Saratoga | 307 | 1,740 |
† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.
Questions about Wyoming area codes
How many area codes does Wyoming have?
One: 307.
What are the area codes of the largest cities in Wyoming?
Cheyenne: 307. Casper: 307. Gillette: 307. Laramie: 307. Rock Springs: 307.
What time zone are Wyoming area codes in?
Mountain time.
Every US area code · Wyoming ZIP codes
Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Wyoming area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/wy
Underlying data is public domain or openly licensed — sources, vintages and licences.