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