Lancaster Township is one of twelve townships in Huntington County, Indiana, United States. As of the 2020 census, its population was 1,130 (down from 1,150 at 2010) and it contained 477 housing units.
Lancaster Township was founded in 1837.
According to the 2010 census, the township has a total area of , of which (or 99.28%) is land and (or 0.75%) is water.
The township contains three cemeteries: German Settlement, Loon Creek and Rees.