The 2020 census found 1,115 people in the township.

Located in the southwestern part of the county, it borders the following townships: No municipalities are located in Sunfish Township.

Elm Grove has been a populated place within the township since before 1812.

[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,[6] 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.