Washington Township is one of fourteen townships in Carroll County, Indiana.

As of the 2020 census, its population was 551 (slightly up from 549 at 2010[4]) and it contained 297 housing units.

Washington Township was organized in 1835.

[5] According to the 2010 census, the township has a total area of 29.84 square miles (77.3 km2), of which 29.83 square miles (77.3 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.

[4] The township contains two cemeteries: Hopewell and Rock Creek.