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