Washington Township is one of sixteen townships in Butler County, Iowa, USA.

As of the 2020 census, its population was 326.

[3] Washington Township covers an area of 36.14 square miles (93.6 km2) and contains no incorporated settlements.

According to the USGS, it contains two cemeteries: Memorial Park and the cemetery at Washington Reformed Church.

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