There was a total of approximately $8 million of land and rural real estate for sale in Menard County recently on Land.com. The total size of all Menard County land and rural real estate for sale was nearly 1,000 acres. Menard County ranks 53rd out of 102 counties in Illinois for the total acreage of land currently advertised for sale. Petersburg had the most land for sale. Its economy is defined as agricultural, with 369 farms recorded in the county during the most recent U.S. Census. Farming activities in Menard County generate annual revenues of $12 million, most of which is from crops. Menard County is the 90th largest county (315 square miles) in Illinois. It's located in the Central Illinois region of the state.