Harlan Township is one of the eleven townships of Warren County, Ohio, United States. It is located in the southeast corner of the county. The population was 4,929 as of the 2020 census.
Pleasant Plain, Ohio
…Pleasant Plain is a village in Harlan Township, Warren County, Ohio, United States. The population was 129 at the 2020 census. Pleasant Plain was originally called New Columbia, and under the latter…