
Quincy
- County:
- Grant County
- County Seat:
- No
- Area (mi²):
- 6.268
- State:
- Washington
Quincy is a city located in Grant County, Washington. Quincy has a 2025 population of 8,770. Quincy is currently growing at a rate of 2.67% annually and its population has increased by 14.91% since the most recent census, which recorded a population of 7,632 in 2020.
The average household income in Quincy is $88,733 with a poverty rate of 13.14%. The median age in Quincy is 29.3 years: 29.7 years for males, and 27.1 years for females.