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