Below are a list of the cities located in Mchenry County, IL. There are 19 total unique zip codes in Mchenry County, Illinois. The time zone for Mchenry County is the Central Daylight Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 17111.
The population in Mchenry County, IL is currently 311,122. That is an increase of 0.97% vs the population of 308,760 in 2010.
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