McHenry, IL Profile: Facts, Map & Data


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McHenry, Illinois - Basic Facts

The City of McHenry had a population of 27,285 as of July 1, 2017. McHenry 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 McHenry is located at latitude 42.3395 and longitude -88.293 in McHenry County. The formal boundaries for the City of McHenry (see map below) encompass a land area of 14.6 sq. miles and a water area of 0.44 sq. miles. McHenry County is in the Central time zone (GMT -6). The elevation is 797 feet.

The City of McHenry (GNIS ID: 2395070) 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 McHenry is located within Township of McHenry, a minor civil division (MCD) of McHenry County.

Beneath the boundary map are tables with McHenry 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 McHenry, IL Boundary Map

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


Total Population 27,285
Daytime Population: Workers 14,842
Daytime Population: Residents 12,767
Total Daytime Population (TDP) 27,609
Ratio TDP/Total Population1 1.01
Population in Households 27,087
Population in Familes 22,329
Population in Group Qrtrs 198
Population Density2 1,868
Diversity Index3 41


Median Household Income $69,565
Average Household Income $85,703
Per Capita Income $32,587


Total Housing Units 11,032 (100%)
Owner Occupied HU 7,589 (68.8%)
Renter Occupied HU 2,651 (24.0%)
Vacant Housing Units 792 ( 7.2%)
Median Home Value $205,196
Average Home Value $233,037


Total Households 10,240
Average Household Size 2.65
Family Households 6,989
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 0.15% 0.08%
Households 0.22% 0.13%
Families 0.04% 0.05%
Median Household Income   2.2%
Per Capita Income   2.67%

McHenry, IL - Peer Comparisons by Rank and Percentile

The table below compares McHenry 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 # 79 94th
Population Density # 313 77th
Diversity Index # 241 82nd
Median Household Income # 270 80th
Per Capita Income # 299 78th

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

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