The value of all land for sale in Lewis County recently was nearly $20 million, representing a total of 2,566 acres of land for sale in Lewis County. Lewis County ranks 34th in the state for the total acreage of land currently advertised for sale. Kamiah had the most land for sale. Agriculture and farming drives the Lewis County economy, with 216 farms recorded in the county during the U.S. Census in 2012. Farming activities in Lewis County generate annual revenues of $2 million, most of which is from crops. Lewis County is the 41st biggest county (479 square miles) in Idaho. It's located in the North Central Idaho region of the state.