Union Township is one of eleven townships in Benton County, Indiana.

As of the 2020 census, its population was 283 and it contained 92 housing units.

[3] The township was organized in June 1864 and named by John W. Nutt "because of the loyalty shown in furnishing soldiers for the Union army.

"[4] According to the 2010 census, the township has a total area of 35.77 square miles (92.6 km2), of which 35.76 square miles (92.6 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.

[3]