A total of approximately 1,000 acres were listed for sale in Williams County, Ohio, recently, representing a total value of $1 million in Williams County land for sale. Williams County ranks 84th out of 88 counties in Ohio for the combined amount of land currently advertised for sale. Bryan featured the most land for sale. Williams County is Ohio's 57th largest county (423 square miles). It's located in the Northwest Ohio region of Ohio.