A total of nearly 1,000 acres were listed for sale in Multnomah County, Oregon, recently, representing a total value of nearly $147 million in Multnomah County land and rural real estate for sale. Multnomah County ranks 24th out of 36 counties in the Beaver State for the combined amount of land currently advertised for sale. Of all farms, ranches, hunting land and other land for sale in Multnomah County, Portland had the most land for sale. Multnomah County is Oregon's 36th biggest county (465 square miles). It's located in the Portland Metro Oregon region of Oregon.