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