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 zero Clay foreclosures of five thousand four hundred thirty-eight Clay, South Dakota housing units housing units, of which four thousand eight hundred seventy-eight are occupied, two thousand six hundred fifty-two are owner occupied, two thousand two hundred twenty-six are rented, five hundred sixty are vacant, and one thousand sixteen have mortgages. has four thousand eight hundred seventy-eight households, and thirteen thousand five hundred thirty-seven citizens.