Of 102 counties in the Prairie State, Brown County ranks 91st by size (307 square miles). Brown County is in Western Illinois. Recent Land Network data includes around 1,000 acres of ranches for sale in Illinois's Brown County, which is valued at a combined $827,650. Browse all Brown County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Brown County is recreational property.