Ohlman is a village in Montgomery County, Illinois, United States. As of the 2020 census, the village had a population of 109. History The village is named for Michael Ohlman, a Civil War captain of a Mississippi River steamboat. The settlement was located on the Chicago and Eastern Illinois Railroad. Geography According to the 2010 census, Ohlman has a total area of , all land. Demographics The census of 2000 showed there were no people living in the village; a recount in 2004 issued a revised population of 148. See also List of municipalities in Illinois References External links Ohlman Illinois, Historical Society of Montgomery County Illinois Villages in Montgomery County, Illinois Villages in Illinois