A combined approximately 1,000 acres were listed for sale in Garfield County recently; the value of all Garfield County farms and ranches for sale was approximately $5 million. Garfield County ranks 36th out of 39 counties in Washington for the total acreage of land currently advertised for sale. Pomeroy had the most land for sale. From an economic perspective, government and state-level services contribute most to Garfield County's overall GDP. Garfield County is Washington's 33rd largest county (718 square miles). It's located in the Eastern Washington region of Washington.