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Marion County, Illinois locator map According to the United States Census Bureau, Centralia is a City that is located primarily in Marion County, Illinois at 38.52 degrees North and 89.12 degrees West.  The city's time zone is America/Chicago, and the city's primary telephone area code is 618.  The land area of Centralia is about 8.19 square miles, whereas the water area of the city is about 1.03 square miles. 

The Census Bureau estimates that Centralia had about 12,452 residents in 2017, which is approximately 1,520 people per square mile of land area. 

According to recent American Community Survey data, Centralia had 5,639 total estimated households and the median household income was about $32,253 per year. 

The Illinois counties map at upper right shows Marion County, highlighted in red.  Use the menu below to display interactive maps of Centralia, either in a frame on this page or in full-screen mode. 

Centralia, Illinois Maps

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