Bethlehem Township is one of fourteen townships in Cass County, Indiana.

As of the 2020 census, its population was 745 (down from 795 at 2010[4]) and contained 322 housing units.

Bethlehem Township was organized in 1836.

It was named for an early settler's native hometown of Bethlehem, Pennsylvania.

[5] According to the 2010 census, the township has a total area of 35.36 square miles (91.6 km2), of which 35.31 square miles (91.5 km2) (or 99.86%) is land and 0.04 square miles (0.10 km2) (or 0.11%) is water.