Island Lake, IL Profile: Facts & Data


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Island Lake, Illinois - Basic Facts

The Village of Island Lake had a population of 8,029 as of July 1, 2020. Island Lake 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 Island Lake is located at latitude 42.2761 and longitude -88.192 in Lake County. The formal boundaries for the Village of Island Lake encompass a land area of 3.39 sq. miles and a water area of 0.21 sq. miles. Lake County is in the Central time zone (GMT -6). The elevation is 781 feet.

While the primary coordinates for Village of Island Lake are located in Lake County, it should be noted that the formal boundaries for this community also extend into and McHenry County.

The Village of Island Lake (GNIS ID: ) has a P1 Census Class Code which indicates populated place that is also an incorporated place with the same name and the same census code. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The Village of Island Lake is located within Township of Wauconda, a minor civil division (MCD) of Lake County.


Island Lake, IL Data & Demographics (As of July 1, 2020)


Total Population 8,029 (100%)
Population in Households 8,013 (99.8%)
Population in Families 6,690 (83.3%)
Population in Group Quarters1 16 ( 0.2%)
Population Density 2,398
Diversity Index2 47


Median Household Income $75,277
Average Household Income $87,903
% of Income for Mortgage4 10%
Per Capita Income $33,235
Wealth Index5 89


Total HU (Housing Units) 3,234 (100%)
Owner Occupied HU 2,584 (79.9%)
Renter Occupied HU 483 (14.9%)
Vacant Housing Units 168 ( 5.2%)
Median Home Value $180,152
Average Home Value $215,122
Housing Affordability Index3 209


Total Households 3,066
Average Household Size 2.61
Family Households 2,146
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population -0.13% -0.05%
Households 0.11% 0.08%
Families -0.08% -0.03%
Median Household Income   1.53%
Per Capita Income   2.38%
Owner Occupied HU   0.12%


Island Lake, IL - Peer Comparisons by Rank and Percentile

The table below compares Island Lake to the other 1,369 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2020 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 # 259 81st
Population Density # 184 87th
Median Household Income # 292 79th
Housing Affordability Index # 515 38th
Per Capita Income # 425 69th
Diversity Index # 217 84th

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

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