Seal Township is one of the fourteen townships of Pike County, Ohio, United States.

The 2020 census found 3,351 people in the township.

The village of Piketon is located in northwestern Seal Township.

[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.