McHenry County IL Information


McHenry County Subdivisions

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


Total Population 311,424
Daytime Population: Workers 115,511
Daytime Population: Residents 144,900
Total Daytime Population (TDP) 260,411
Ratio TDP/Total Population1 0.84
Population in Households 309,777
Population in Familes 268,802
Population in Group Qrtrs 1,647
Population Density2 516
Diversity Index3 40


Median Household Income $80,275
Average Household Income $99,567
Per Capita Income $35,648


Total Housing Units 118,972 (100%)
Owner Occupied HU 90,037 (75.7%)
Renter Occupied HU 20,854 (17.5%)
Vacant Housing Units 8,081 ( 6.8%)
Median Home Value $235,152
Average Home Value $275,292


Total Households 110,891
Average Household Size 2.79
Family Households 82,812
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 0.12% 0.31%
Households 0.21% 0.37%
Families 0.09% 0.29%
Median Household Income   1.69%
Per Capita Income   2.37%


McHenry County IL - Peer Comparisons by Rank and Percentile

The table below compares McHenry County to the other 102 counties and county equivalents 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 # 6 95th
Population Density # 7 94th
Diversity Index # 20 81st
Median Household Income # 5 96th
Per Capita Income # 4 97th

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