Buffalo
- County:
- Johnson County
- County Seat:
- Yes
- Area (mi²):
- 4.54
- State:
- Wyoming
Buffalo is a city located in Johnson County, Wyoming. Buffalo has a 2026 population of 4,655. It is also the county seat of Johnson County. Buffalo is currently growing at a rate of 0.37% annually and its population has increased by 5.15% since the most recent census, which recorded a population of 4,427 in 2020.