The 2020 census found 2,991 people in the township.

Located in the eastern part of the county, it borders the following townships: Part of western Washington Township is occupied by the city of Circleville, the county seat of Pickaway County.

It is one of forty-three Washington Townships statewide.

[4] The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1.

There is also an elected township fiscal officer,[5] who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election.