Calpine
- County:
- Sierra County
- County Seat:
- No
- Area (mi²):
- 0.71
- State:
- California
Calpine is a CDP located in Sierra County, California. Calpine has a 2025 population of 67. Calpine is currently declining at a rate of -12.99% annually and its population has decreased by -59.15% since the most recent census, which recorded a population of 164 in 2020.
The median age in Calpine is 13.1 years: 13.4 years for males, and 12.5 years for females.