As of the 2010 census, its population was 2,689 and it contained 1,068 housing units.

[4] As of January 1, 2022, Franklin, Union, and Needham townships were merged into a single entity known as Franklin-Union-Needham Township ("FUN").

[5] Union Township was organized in 1830.

[6] According to the 2010 census, the township has a total area of 36.15 square miles (93.6 km2), of which 36.14 square miles (93.6 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.

This Johnson County, Indiana location article is a stub.