Boulder
- County:
- Garfield County
- County Seat:
- No
- Area (mi²):
- 20.945
- State:
- Utah
Boulder is a town located in Garfield County, Utah. Boulder has a 2026 population of 244. Boulder is currently declining at a rate of -0.81% annually but its population has increased by 5.63% since the most recent census, which recorded a population of 231 in 2020.