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 sixty-two Grundy foreclosures of fifteen thousand forty Grundy, Illinois housing units housing units, of which fourteen thousand two hundred ninety-three are occupied, ten thousand three hundred forty-nine are owner occupied, three thousand nine hundred forty-four are rented, seven hundred forty-seven are vacant, and five thousand eight hundred fifty-nine have mortgages. has fourteen thousand two hundred ninety-three households, and thirty-seven thousand five hundred thirty-five citizens.