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