A total of almost 1,000 acres were listed for sale in Washington's Garfield County recently; the combined value of all Garfield County farms, ranches, and rural real estate for sale was $4 million. Garfield County ranks 38th out of 39 counties in the state for the total acreage of land currently advertised for sale. Pomeroy had the most land for sale. Government and state-level services are the main economic drivers in Garfield County. Garfield County is the 33rd biggest county (718 square miles) in Washington. It's located in the Eastern Washington region of Washington.