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