Land for sale in Lewis County, Idaho, recently totaled around $12 million and nearly 1,000 acres. Lewis County ranks 40th out of 44 counties in Idaho for the total acreage of land currently advertised for sale. Kamiah featured 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 largest county (479 square miles) in Idaho. It's located in the North Central Idaho region of the state.