Land for sale in Whitman County, Washington, recently totaled around $28 million and almost 1,000 acres. Whitman County ranks 29th out of 39 counties in Washington for the combined amount of land currently advertised for sale. Among cities in Whitman County with farms, ranches, hunting land and other land for sale, 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 largest county (2,177 square miles) in Washington. It's located in the Eastern Washington region of the state.