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