Union Township is one of twelve townships in Huntington County, Indiana, United States. As of the 2020 census, its population was 1,205.
Union Township was originally called Monroe Township, and under the latter name was organized in 1842. It was renamed Union Township in 1845.
The John and Minerva Kline Farm was listed on the National Register of Historic Places in 1988.
According to the 2010 census, the township has a total area of , of which (or 98.16%) is land and (or 1.87%) is water.
Feighner Cemetery is a family cemetery that was founded in 1871 by the Feighner, Haney, Shriner, Plasterer, Smith and Branstator families and is still maintained by the Branstator family today (2019). It contains, as of 2019, 82 individuals. https://lck993.wixsite.com/feighner-cemetery