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