The value of land and rural real estate for sale in Washington's Adams County recently on Land.com was $27 million. This represents 3,000 acres of land and rural real estate for sale in Adams County. Adams County ranks 36th in the Evergreen State for the total number of acres of land currently advertised for sale. Othello featured the most land for sale. Its economy is defined as agricultural, with 713 farms recorded in the county during the most recent U.S. Census. Farming activities in Adams County generate annual revenues of $24 million, most of which is from crops. Adams County is Washington's 17th biggest county (1,929 square miles). It's located in the Eastern Washington region of Washington.