The value of all farms and ranches for sale in Washington's Whitman County recently was $35 million, representing a total of 565 acres of land for sale in Whitman County. Whitman County ranks 24th out of 39 counties in the Evergreen State for the total number of acres of land currently advertised for sale. Of all land for sale in Whitman County, Pullman had the most land for sale. From an economic perspective, government and state-level services contribute most to Whitman County's overall GDP. Whitman County is the 16th biggest county (2,177 square miles) in Washington. It's located in the Eastern Washington region of Washington.