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