Clearlake
- County:
- Lake County
- County Seat:
- No
- Area (mi²):
- 10.129
- State:
- California
Clearlake is a city located in Lake County, California. Clearlake has a 2026 population of 16,636. Clearlake is currently growing at a rate of 0.37% annually but its population has decreased by -0.35% since the most recent census, which recorded a population of 16,695 in 2020.