Washington Township is one of seventeen townships in Adair County, Iowa, USA.

[3] Washington Township was organized in 1854.

[4] Washington Township covers an area of 35.62 square miles (92.3 km2) and contains no incorporated settlements.

According to the USGS, it contains six cemeteries: Avondale, Campbell, Garner, Mormon, Winn and Witt.

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