The value of farms, ranches, and rural real estate for sale in Williams County, Ohio, recently on Land.com was $2 million. This represents nearly 1,000 acres of farms, ranches, hunting land and other land for sale in Williams County. Williams County ranks 83rd in the Buckeye State for the total number of acres of land currently advertised for sale. Montpelier featured the most land for sale. Williams County is the 57th biggest county (423 square miles) in Ohio. It's located in the Northwest Ohio region of Ohio.