Algonquin, IL Profile: Facts, Map & Data

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Algonquin, Illinois - Basic Facts

The Village of Algonquin is an incorporated place (Class Code P1) located in McHenry County at latitude 42.1625 and longitude -88.3156. McHenry County is in the Central time zone (GMT -6). The elevation is 741 feet.

The formal official name is the Village of Algonquin, but most people and references simply refer to it as Algonquin, Illinois.

The P1 Census Class Code for Algonquin indicates a populated place that is also an incorporated place with the same name and the same census code. The Incorporated Place has a Functional Status Code "A" which identifies an active government providing primary general-purpose functions.

Village of Algonquin, IL Boundary Map

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Boundary Maps: Township of Algonquin | McHenry County | Illinois Counties

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Algonquin, IL Data & Demographics (As of July 1, 2014)


Total Population 30,022
Population in Households 30,022
Population in Familes 26,885
Population in Group Qrtrs 0
Population Density1 2,456
Diversity Index2 37


Total Households 10,250
Average Household Size 2.93
Family Households 8,062
Average Family Size 3


Total Housing Units 10,804 (100%)
Owner Occupied HU 9,252 (85.6%)
Renter Occupied HU 997 ( 9.2%)
Vacant Housing Units 554 ( 5.1%)
Median Home Value $231,580
Average Home Value $251,148


Median Household Income $93,618
Average Household Income $116,185
Per Capita Income $39,928
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population -0.02% -0.06%
Households 0.01% -0.04%
Families -0.31% -0.1%
Median Household Income   2.25%
Per Capita Income   2.71%
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.

Algonquin, IL - Peer Comparisons by Rank and Percentile

The table below compares Algonquin to the other 1,367 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2014 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 # 65 95th
Population Density1 # 185 87th
Diversity Index2 # 257 81st
Median Household Income # 80 94th
Per Capita Income # 106 92nd

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