Land for sale in Lewis County, Idaho, recently totaled $17 million and approximately 2,000 acres. Lewis County ranks 40th out of 44 counties in the Gem State for the combined amount of land currently advertised for sale. Of all locations in Lewis County with land and rural real estate for sale, Kamiah featured the most land for sale. Lewis County has a large agricultural economy, with 216 farms recorded in the county during the latest U.S. Census. Farming activities in Lewis County generate annual revenues of $2 million, most of which is from crops. Lewis County is Idaho's 41st biggest county (479 square miles). It's located in the North Central Idaho region of Idaho.