Chehalis
- County:
- Lewis County
- County Seat:
- Yes
- Area (mi²):
- 5.807
- State:
- Washington
Chehalis is a city located in Lewis County, Washington. Chehalis has a 2026 population of 7,717. It is also the county seat of Lewis County. Chehalis is currently growing at a rate of 2.01% annually and its population has increased by 3.18% since the most recent census, which recorded a population of 7,479 in 2020.