Issaquah
- County:
- King County
- County Seat:
- No
- Area (mi²):
- 12.13
- State:
- Washington
Issaquah is a city located in King County, Washington. Issaquah has a 2026 population of 39,664. Issaquah is currently growing at a rate of 0.83% annually but its population has decreased by -1.09% since the most recent census, which recorded a population of 40,103 in 2020.