Washington Township is one of nine townships in Whitley County, Indiana, United States. As of the 2020 census, its population was 1,253 (down from 1,281 at 2010) and it contained 478 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.89%) is land and (or 0.11%) is water. The streams of Cox Branch and Huffman Branch run through this township.
(This list is based on USGS data and may include former settlements.)