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