
Centralia
- County:
- Lewis County
- County Seat:
- No
- Area (mi²):
- 7.621
- State:
- Washington
Centralia is a city located in Lewis County, Washington. Centralia has a 2025 population of 19,077. Centralia is currently growing at a rate of 0.86% annually and its population has increased by 4.42% since the most recent census, which recorded a population of 18,269 in 2020.
The average household income in Centralia is $69,191 with a poverty rate of 19.87%. The median age in Centralia is 37.8 years: 35.1 years for males, and 39.9 years for females.