Land for sale in Oneida County, Idaho, recently totaled $28 million and 3,000 acres. Oneida County ranks 37th in the state for the combined amount of land currently advertised for sale. Of all locations in Oneida County with land and rural real estate for sale, Malad City featured the most land for sale. Oneida County has a large agricultural economy, with 503 farms recorded in the county during the latest U.S. Census. Farming activities in Oneida County generate annual revenues of $2 million, most of which is from crops. Oneida County is Idaho's 26th biggest county (1,200 square miles). It's located in the Southeastern Idaho region of the state.