Lake Forest, IL Profile: Facts & Data


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Lake Forest, Illinois - Basic Facts

The City of Lake Forest had a population of 19,089 as of July 1, 2018.

The primary coordinate point for Lake Forest is located at latitude 42.2586 and longitude -87.8406 in Lake County. The formal boundaries for the City of Lake Forest (see map below) encompass a land area of 17.19 sq. miles and a water area of 0.07 sq. miles. Lake County is in the Central time zone (GMT -6). The elevation is 686 feet.

The City of Lake Forest (GNIS ID: 2395590) 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 Lake Forest is located within Township of Shields, a minor civil division (MCD) of Lake County.

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  1. Lake Forest 2018 Demographic Data
  2. Growth Rates for Lake Forest (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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


Total Population 19,089
Population in Households 17,973
Population in Familes 16,087
Population in Group Qrtrs 1,116
Population Density2 1,110
Diversity Index3 24


Median Household Income $172,252
Average Household Income $240,882
Per Capita Income $87,890


Total Housing Units 7,552 (100%)
Owner Occupied HU 5,738 (76.0%)
Renter Occupied HU 1,078 (14.3%)
Vacant Housing Units 736 ( 9.7%)
Median Home Value $970,582
Average Home Value $1,155,408


Total Households 6,816
Average Household Size 2.64
Family Households 5,182
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population -0.18% 0.19%
Households 0.09% 0.39%
Families -0.15% 0.25%
Median Household Income   0.6%
Per Capita Income   1.16%

Lake Forest, IL - Peer Comparisons by Rank and Percentile

The table below compares Lake Forest 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 # 130 91st
Population Density # 689 50th
Diversity Index # 423 69th
Median Household Income # 8 99th
Per Capita Income # 4 100th

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

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