McHenry County IL Information


McHenry County Subdivisions

McHenry County IL Data & Demographics (As of July 1, 2015)


Total Population 310,574
Population in Households 308,927
Population in Familes 268,388
Population in Group Qrtrs 1,647
Population Density1 515
Diversity Index2 38


Total Households 110,583
Average Household Size 2.79
Family Households 82,743
Average Family Size 3


Total Housing Units 118,114 (100%)
Owner Occupied HU 90,037 (76.2%)
Renter Occupied HU 20,546 (17.4%)
Vacant Housing Units 7,531 ( 6.4%)
Median Home Value $197,436
Average Home Value $222,661


Median Household Income $78,805
Average Household Income $96,025
Per Capita Income $34,260
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.11% 0.51%
Households 0.24% 0.58%
Families 0.11% 0.5%
Median Household Income   2.22%
Per Capita Income   2.52%
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.


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, 2015 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 Density1 # 7 94th
Diversity Index2 # 22 79th
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.