There was a total of approximately $15 million of land and rural real estate for sale in Jefferson County recently on Land.com. The total of all Jefferson County ranches, farms, hunting land and other rural land and acreage for sale was 1,000 acres. Jefferson County ranks 41st out of 44 counties in the Gem State for the combined amount of land currently advertised for sale. Rigby had the most land for sale. Agriculture and farming drives the Jefferson County economy, with 776 farms recorded in the county during the U.S. Census in 2012. Farming activities in Jefferson County generate annual revenues of $5 million, most of which is from crops. Jefferson County is the 28th largest county (1,105 square miles) in Idaho. It's located in the Eastern Idaho region of the state.