The value of all land for sale in Asotin County recently was $101 million, representing a total of 10,954 acres of land for sale in Asotin County. Asotin County ranks 11th in the Evergreen State based on the total amount of acres of land for sale among the 39 counties in the Evergreen State. Clarkston featured the most land for sale. Asotin County is Washington's 35th biggest county (640 square miles). It's located in the Eastern Washington region of the state.