Washington Township is one of twelve townships in Adams County, Iowa, United States.

At the 2010 census, its population was 135.

[3] Washington Township covers an area of 35.55 square miles (92.1 km2) and contains no incorporated settlements.

According to the USGS (United States Geological Survey), it contains four cemeteries: Forest Hill, Homan, Mount Etna and Old Mount Etna.

This article about the geography of Adams County, Iowa is a stub.