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