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