Wyoming Area Codes
1 active area code · Cheyenne · Population around 586,722
Wyoming has 1 active area code, serving cities like Cheyenne, Casper, and Gillette. 307 has covered the whole of Wyoming since 1947. Each code below links to its cities, carriers, timezone, and coverage map.
Wyoming Area Code Map
What area codes does Wyoming have?
Every one of the 23 counties in Wyoming is covered by this code and no other.
How many phone prefixes does Wyoming use?
Wyoming's area code holds 460 assigned prefixes, listed under 48 distinct carrier names. A prefix is the three digits after the area code, and NANPA assigns each one to a single carrier.
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Wyoming have?
Wyoming has 1 active area code: 307.
What is the main area code for Wyoming?
Wyoming has a single area code, 307, in service since 1947. It covers Cheyenne, the largest city in Wyoming, and every county in Wyoming.
What are the largest cities in Wyoming?
The largest cities in Wyoming include Cheyenne, Casper, Gillette, Laramie, Rock Springs.
What is the total population of Wyoming?
Wyoming has an estimated total population of 586,722 based on US Census PEP 2024 data.
What is the newest area code in Wyoming?
307, in service since 1947. It is the only area code in Wyoming.
Is my county covered by more than one area code in Wyoming?
No. All 23 counties in Wyoming are covered by 307, so no county here carries two.