McHenry County Population 2018

McHenry County's estimated population is 309,122 with a growth rate of 0.37% in the past year according to the most recent United States census data. McHenry County is the 6th largest county in Illinois.

Year Population Growth Growth Rate
2017309,1221,1500.37%
2016307,972120.00%
2015307,9604050.13%
2014307,555-52-0.02%
2013307,607-563-0.18%
2012308,170-217-0.07%
2011308,387-672-0.22%
2010309,059125,81868.66%
1990183,24135,34423.90%
1980147,89736,34232.58%
1970111,55527,34532.47%
196084,21033,55466.24%
195050,65613,34535.77%
194037,3112,2326.36%
193035,0791,9155.77%
192033,1646552.01%
191032,5092,7509.24%
190029,7593,64513.96%
189026,1141,2064.84%
188024,9081,1464.82%
187023,7621,6737.57%
186022,0897,11147.48%
185014,97812,400480.99%
18402,5780.00%

McHenry County Population Growth

Population Data via

McHenry County Race Data

Race Population Percentage
White287,88493.13%
Asian8,6302.79%
Black or African American4,5751.48%
Two or More Races4,5341.47%
American Indian and Alaska Native1,3990.45%
Native Hawaiian and Other Pacific Islander1660.05%

McHenry County Population Pyramid

0k2k4k6k8k10k12k Male Population0k2k4k6k8k10k12k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990