The overall value of farms, ranches, and rural real estate for sale in Ottawa County, Oklahoma, recently on Land.com was around $79 million. This represents almost 7,000 acres of land for sale in Ottawa County. Ottawa County ranks 30th in Oklahoma for the total number of acres of land currently advertised for sale. Among cities in Ottawa County with farms, ranches, hunting land and other land for sale, Miami had the most land for sale. Ottawa County is Oklahoma's 74th largest county (484 square miles). It's located in the Green Country Oklahoma region of Oklahoma.