Mchenry information on the site is deemed reliable, but not guaranteed. Our Mchenry stats, Mchenry census, and Mchenry information is aggregated from many different sources and may be dated. Currently, we have two thousand five hundred five Mchenry foreclosures of ninety-two thousand nine hundred eight Mchenry, Illinois housing units housing units, of which eighty-nine thousand four hundred three are occupied, seventy-four thousand three hundred ninety-one are owner occupied, fifteen thousand twelve are rented, three thousand five hundred five are vacant, and fifty-five thousand nine hundred fifty have mortgages. has eighty-nine thousand four hundred three households, and two hundred sixty thousand seventy-seven citizens.