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