Washington Township is one of the twelve townships of Miami County, Ohio, United States.

The 2020 census found 1,503 people in the township.

[4] It is one of forty-three Washington Townships statewide.

[5] 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, 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.