Cahokia, IL Profile: Facts, Map & Data


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Cahokia, Illinois - Basic Facts

The Village of Cahokia had a population of 13,752 as of July 1, 2017. Cahokia 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 Cahokia is located at latitude 38.5659 and longitude -90.1761 in St. Clair County. The formal boundaries for the Village of Cahokia (see map below) encompass a land area of 9.56 sq. miles and a water area of 0.49 sq. miles. St. Clair County is in the Central time zone (GMT -6). The elevation is 407 feet.

The Village of Cahokia (GNIS ID: 2397521) 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 Village of Cahokia is located within Township of Centreville, a minor civil division (MCD) of St. Clair County.

Beneath the boundary map are tables with Cahokia population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Cahokia: Cahos, Canokia, Caokia, Caoquias, Caouaouce, Cohokies, Fort Bowman, Kahokia, Kahokias, Kaohia, Kaos, Notre Dame des Kohokias, Sainte Famille des Kaoquias.

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Village of Cahokia, IL Boundary Map

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Boundary Maps: Township of Centreville | St. Clair County | Illinois Counties

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Cahokia, IL Data & Demographics (As of July 1, 2017)


Total Population 13,752
Daytime Population: Workers 2,989
Daytime Population: Residents 8,761
Total Daytime Population (TDP) 11,750
Ratio TDP/Total Population1 0.85
Population in Households 13,494
Population in Familes 11,269
Population in Group Qrtrs 258
Population Density2 1,439
Diversity Index3 52


Median Household Income $31,737
Average Household Income $43,770
Per Capita Income $15,398


Total Housing Units 6,060 (100%)
Owner Occupied HU 2,496 (41.2%)
Renter Occupied HU 2,112 (34.9%)
Vacant Housing Units 1,452 (24.0%)
Median Home Value $66,920
Average Home Value $69,161


Total Households 4,608
Average Household Size 2.93
Family Households 3,278
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 -1.41% -0.87%
Households -1.46% -0.9%
Families -1.69% -1.01%
Median Household Income   -0.62%
Per Capita Income   1.37%

Cahokia, IL - Peer Comparisons by Rank and Percentile

The table below compares Cahokia to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 179 87th
Population Density # 498 64th
Diversity Index # 168 88th
Median Household Income # 1340 2nd
Per Capita Income # 1348 2nd

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

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