Pleasant Township is one of the seventeen townships of Franklin County, Ohio, United States. As of the 2020 census, the population was 6,757. Parts of two municipalities are located in Pleasant Township: the city of Columbus, the county seat of Franklin County, in the northeast; and the village of Harrisburg, in the south. The unincorporated communities o…Pleasant Township is one of the seventeen townships of Franklin County, Ohio, United States. As of the 2020 census, the population was 6,757. Parts of two municipalities are located in Pleasant Township: the city of Columbus, the county seat of Franklin County, in the northeast; and the village of Harrisburg, in the south. The unincorporated communities of Darbydale and Georgesville lie in the township's south and west, respectively.