
Quincy
- County:
- Plumas County
- County Seat:
- Yes
- Area (mi²):
- 4.224
- State:
- California
Quincy is a CDP located in Plumas County, California. Quincy has a 2025 population of 1,278. It is also the county seat of Plumas County. Quincy is currently declining at a rate of -2.29% annually and its population has decreased by -25.09% since the most recent census, which recorded a population of 1,706 in 2020.
The average household income in Quincy is $96,988 with a poverty rate of 12.07%. The median age in Quincy is 58.4 years: 55.7 years for males, and 61.3 years for females.