Collinsville, IL Profile: Facts, Map & Data


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Collinsville, Illinois - Basic Facts

The City of Collinsville had a population of 24,968 as of July 1, 2017. Collinsville 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 Collinsville is located at latitude 38.6768 and longitude -90.0058 in Madison County. The formal boundaries for the City of Collinsville (see map below) encompass a land area of 14.64 sq. miles and a water area of 0.19 sq. miles. Madison County is in the Central time zone (GMT -6). The elevation is 561 feet.

While the primary coordinates for City of Collinsville are located in Madison County, it should be noted that the formal boundaries for this community also extend into and St. Clair County.

The City of Collinsville (GNIS ID: 2393598) 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 Collinsville is located within Township of Collinsville, a minor civil division (MCD) of Madison County.

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

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City of Collinsville, IL Boundary Map

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


Total Population 24,968
Daytime Population: Workers 10,938
Daytime Population: Residents 12,467
Total Daytime Population (TDP) 23,405
Ratio TDP/Total Population1 0.94
Population in Households 24,903
Population in Familes 19,104
Population in Group Qrtrs 65
Population Density2 1,706
Diversity Index3 36


Median Household Income $50,718
Average Household Income $65,375
Per Capita Income $28,081


Total Housing Units 11,941 (100%)
Owner Occupied HU 6,699 (56.1%)
Renter Occupied HU 3,996 (33.5%)
Vacant Housing Units 1,245 (10.4%)
Median Home Value $122,573
Average Home Value $137,017


Total Households 10,696
Average Household Size 2.33
Family Households 6,550
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 -0.33% -0.27%
Households -0.29% -0.23%
Families -0.47% -0.37%
Median Household Income   0.66%
Per Capita Income   2.28%

Collinsville, IL - Peer Comparisons by Rank and Percentile

The table below compares Collinsville 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 # 96 93rd
Population Density # 383 72nd
Diversity Index # 284 79th
Median Household Income # 805 41st
Per Capita Income # 564 59th

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

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