Decker Township is one of ten townships in Knox County, Indiana.

As of the 2020 census, its population was 209 (down from 227 at 2010[3]) and it contained 95 housing units.

[4] Decker Township is named for the Decker family of pioneer settlers.

[6] According to the 2010 census, the township has a total area of 46.43 square miles (120.3 km2), of which 44.35 square miles (114.9 km2) (or 95.52%) is land and 2.08 square miles (5.4 km2) (or 4.48%) is water.

This Knox County, Indiana location article is a stub.