City of Centralia, Illinois

Centralia is located at 38°31'29" North, 89°7'59" West (38.525000, -89.133056).

According to the United States Census Bureau, the city has a total area of 7.64 mi² (19.78 km²). 7.50 mi² (19.43 km²) of it is land and 0.14 mi² (0.35 km²) of it is covered by water. The total area is 1.79% water.

Centralia is located in the Central Standard Time (CST) timezone, GMT-06:00. It observes Daylight Saving Time (DST).