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