Osco Township, Henry County, Illinois
Osco Township is one of twenty-four townships in Henry County, Illinois, USA. As of the 2010 census, its population was 459 and it contained 193 housing units. Osco changed its name from Essex Township on April 13, 1857. Geography. According to the 2010 census, the township has a total area of , all land. (This list is based on USGS data and may include former settlements.) Cemeteries. The township contains these two cemeteries: Grace Episcopal and Morristown.