The value of all land for sale in Washington's Adams County recently was around $36 million, representing a combined 2,107 acres of land for sale in Adams County. Adams County ranks 36th in the Evergreen State for the total acreage of land currently advertised for sale. Of all locations in Adams County with land for sale, Othello had 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 the state.