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