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 | Official name: State of Wyoming Wyoming postal code abbreviation: WY Wyoming prefix phone numbers: 307 You may also be interested in the answers to the following questions: Total area: 253 348 km2 ✅ What is the largest city by population in Wyoming?- Largest Wyoming cities by population: Cheyenne ✅ What is the capital of Wyoming?- State capital of Wyoming: Cheyenne ✅ What is the population of Wyoming?- Wyoming state population 2025: 568 158 |