Centralia is a city located in Washington. With a 2020 population of 18,205, it is the 60th largest city in Washington and the 1999th largest city in the United States. Centralia is currently growing at a rate of 1.28% annually and its population has increased by 11.44% since the most recent census, which recorded a population of 16,336 in 2010. Centralia reached it's highest population of 18,205 in 2021. Spanning over 8 miles, Centralia has a population density of 2,403 people per square mile.
The average household income in Centralia is $53,927 with a poverty rate of 17.65%. The median rental costs in recent years comes to $876 per month, and the median house value is $157,300. The median age in Centralia is 37.8 years, 35.9 years for males, and 40.2 years for females. For every 100 females there are 99.5 males.