Oak Forest, IL Profile: Facts, Map & Data


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Oak Forest, Illinois - Basic Facts

The City of Oak Forest had a population of 27,511 as of July 1, 2015. Oak Forest ranks in the upper quartile for Population Density and 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 Oak Forest is located at latitude 41.607 and longitude -87.7535 in Cook County. The formal boundaries for the City of Oak Forest (see map below) encompass a land area of 5.95 sq. miles and a water area of 0.05 sq. miles. Cook County is in the Central time zone (GMT -6). The elevation is 673 feet.

The City of Oak Forest (GNIS ID: 2395281) 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 Oak Forest is located within Township of Bremen, a minor civil division (MCD) of Cook County.

Beneath the boundary map are tables with Oak Forest population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

Neighborhood Data

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City of Oak Forest, IL Boundary Map

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Boundary Maps: Township of Bremen | Cook County | Illinois Counties

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Oak Forest, IL Data & Demographics (As of July 1, 2015)


Total Population 27,511
Population in Households 27,467
Population in Familes 23,673
Population in Group Qrtrs 44
Population Density1 4,623
Diversity Index2 49


Total Households 10,115
Average Household Size 2.72
Family Households 7,286
Average Family Size 3


Total Housing Units 10,676 (100%)
Owner Occupied HU 8,110 (76.0%)
Renter Occupied HU 2,005 (18.8%)
Vacant Housing Units 561 ( 5.3%)
Median Home Value $221,182
Average Home Value $231,565


Median Household Income $69,247
Average Household Income $82,185
Per Capita Income $30,215
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.31% -0.15%
Households -0.17% -0.08%
Families -0.24% -0.15%
Median Household Income   2.85%
Per Capita Income   2.67%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Oak Forest, IL - Peer Comparisons by Rank and Percentile

The table below compares Oak Forest to the other 1,367 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2015 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 # 76 95th
Population Density1 # 54 96th
Diversity Index2 # 183 87th
Median Household Income # 257 81st
Per Capita Income # 332 76th

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