Land for sale in Menard County recently totaled almost $6 million and almost 1,000 acres. Menard County ranks 67th in the Inland Empire for the total acreage of land currently advertised for sale. Among cities in Menard County with farms and rural real estate for sale, Petersburg had the most land for sale. Agriculture and farming drives the Menard County economy, with 369 farms recorded in the county during the U.S. Census in 2012. Farming activities in Menard County generate annual revenues of $12 million, most of which is from crops. Menard County is the 90th biggest county (315 square miles) in Illinois. It's located in the Central Illinois region of the state.