Vermilion County is named after the Vermilion River. According to the 2017 Census of Agriculture, there were 1,049 farms in Vermilion County, spanning 471,468 acres, with an average farm size of 449 acres. The population of Vermilion County was 81,625 (based on 2010 census). Vermilion County’s temperatures range from 17°F during January to 86°F during July. Average monthly precipitation ranges from 1.99" during February to 4.70" during June. If you're looking for land for sale in Vermilion County, IL, check out Land Pro LLC's current listings below. If there are no current listings in Vermilion County, take a look at land for sale in neighboring Champaign County, Ford County, and Iroquois County. You can also view all the Illinois land offered for sale by Land Pro LLC.