Ogle County was named after Captain Joseph Ogle, a Revolutionary War veteran. According to the 2017 Census of Agriculture, there were 1,011 farms in Ogle County, spanning 354,587 acres, with an average farm size of 351 acres. The population of Ogle County was 53,497 (based on 2010 census). Ogle County’s temperatures range from 10°F during January to 82°F during July. Average monthly precipitation ranges from 1.43" during February to 4.88" during June. If you're looking for land for sale in Ogle County, IL, check out Land Pro LLC's current listings below. If there are no current listings in Ogle County, take a look at land for sale in neighboring DeKalb County and Lee County. You can also view all the Illinois land offered for sale by Land Pro LLC.