Centralia, IL Profile: Facts & Data


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Centralia, Illinois - Basic Facts

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The City of Centralia had a population of 12,517 as of July 1, 2018. Centralia ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Centralia is located at latitude 38.5221 and longitude -89.1235 in Marion County. The formal boundaries for the City of Centralia (see map below) encompass a land area of 8.19 sq. miles and a water area of 1.03 sq. miles. Marion County is in the Central time zone (GMT -6). The elevation is 492 feet.

While the primary coordinates for City of Centralia are located in Marion County, it should be noted that the formal boundaries for this community also extend into Clinton County, Jefferson County, and Washington County.

The City of Centralia (GNIS ID: 2393787) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Centralia is located within Township of Centralia, a minor civil division (MCD) of Marion County.

Beneath the boundary map are tables with Centralia population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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Centralia, IL Data & Demographics (As of July 1, 2018)


Total Population 12,517
Population in Households 12,005
Population in Familes 8,792
Population in Group Qrtrs 512
Population Density1 1,528
Diversity Index2 35


Median Household Income $36,337
Average Household Income $49,805
Per Capita Income $21,380


Total Housing Units 6,359 (100%)
Owner Occupied HU 3,418 (53.8%)
Renter Occupied HU 1,904 (29.9%)
Vacant Housing Units 1,037 (16.3%)
Median Home Value $68,505
Average Home Value $84,596


Total Households 5,322
Average Household Size 2.26
Family Households 3,035
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.49% -0.48%
Households -0.41% -0.4%
Families -0.68% -0.57%
Median Household Income   2.66%
Per Capita Income   2.83%

Centralia, IL - Peer Comparisons by Rank and Percentile

The table below compares Centralia to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 195 86th
Population Density # 449 67th
Diversity Index # 302 78th
Median Household Income # 1303 5th
Per Capita Income # 1224 11th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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