Union Township was organized in 1840. It was likely named after Union County, Indiana,
the former home of some of the early settlers Union Township Early Patents - Names of the holders & information The township has a total area of 43.95 square miles (113.8 km2), of which 40.8 square miles (106 km2) (or 92.83%) is land and 3.16 square miles (8.2 km2) (or 7.19%) is water |