Boulder
- County:
- Sublette County
- County Seat:
- No
- Area (mi²):
- 1.887
- State:
- Wyoming
Boulder is a CDP located in Sublette County, Wyoming. Boulder has a 2025 population of 6. Boulder is currently declining at a rate of -68.42% annually and its population has decreased by -76% since the most recent census, which recorded a population of 25 in 2020.