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