Clark Township is one of the fourteen townships of Holmes County, Ohio, United States. As of the 2020 census the population of the township was 4,322.

Holmes County is a county in the U.S. state of Ohio. As of the 2020 Census, the population was 44,223. Its county seat is Millersburg. The county was formed in 1824 from portions of Coshocton, Tuscarawas and Wayne counties and organized the following year. It was named after Andrew Holmes, an officer killed in the War of 1812.