Wyoming Area Code 307: Complete Guide to the Equality State (2026)

📅 2026-02-22 ⏱️ 14 min read ✍️ BubblyPhone Team

Complete guide to Wyoming area code 307 — the only area code in the least populous US state. History, time zone, Yellowstone, and scam checks.

Wyoming has one area code — 307 — covering the entire state and its roughly 584,000 people across 23 counties. That's the least populous state in America, with fewer residents than many individual cities. Wyoming has never needed a second area code since 307 was assigned in 1947.

Quick Facts

State: Wyoming
Population: ~584,000 (50th — least populous)
Total Area Codes: 1 (just 307)
Time Zone: Mountain (entire state)
Original Code: 307 (1947, never split)
Dialing: 7-digit local dialing still works
Capital: Cheyenne (~65,000)
Motto: "Equal Rights"

Wyoming Highlights

Home to Yellowstone — the world's first national park, sitting atop a supervolcano. Wyoming gave women the vote in 1869 — 51 years before the 19th Amendment. Devils Tower became America's first National Monument in 1906.

Is a 307 Area Code Call a Scam?

Area code 307 is a legitimate code serving approximately 584,000 people. Always verify unknown callers. Use our Spam Number Checker to check suspicious numbers.

How to Call Wyoming Internationally

Dial exit code + 1 + 307 + 7-digit number. On mobile: +1-307-XXX-XXXX. Use Best Time to Call for Mountain Time info. Look up any code with our Area Code Lookup. Check our rates.