Clark Township is one of the fourteen townships of Holmes County, Ohio, United States.

Located in the southeastern corner of the county, it borders the following townships: Part of the village of Baltic is located in southeastern Clark Township, and the unincorporated communities of Charm, Farmerstown, and Unionville lie in the northwestern, central, and northeastern parts of the township.

Statewide, other Clark Townships are located in Brown, Clinton, and Coshocton counties.

[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.