Washington Township is one of twelve townships in Adams County, Iowa, USA. At the 2010 census, its population was 135. Geography Washington Township covers an area of 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. References External links US-Counties.com City-Data.com Townships in Adams County, Iowa Townships in Iowa