Washington Township is one of the nine townships of Marion County, Indiana, located in the northern part of the county. The township is entirely within the city of Indianapolis. The population as of the 2010 census was 132,049. The first settlement at Washington Township was made in 1819.
On January 1, 2007, the Washington Township Fire Department became the first township fire department in Marion County to consolidate into the Indianapolis Fire Department as part of Indianapolis Mayor Bart Peterson's proposed Indy Works government cost-savings plan. Although Indy Works, which included merging of Marion County fire departments as part of its cost saving efforts, failed to pass in the City-County Council, on July 1, 2007, the Warren Township Fire Department also voluntarily consolidated with the Indianapolis Fire Department.