West Chester Township is one of the thirteen townships of Butler County, Ohio, United States, located in the southeastern corner of the county. It is the most populous township in Ohio, with a population of 65,242 at the 2020 census. Situated between Sharonville and Liberty Township, West Chester is about 18 miles north of Cincinnati and is included in the Ci…West Chester Township is one of the thirteen townships of Butler County, Ohio, United States, located in the southeastern corner of the county. It is the most populous township in Ohio, with a population of 65,242 at the 2020 census. Situated between Sharonville and Liberty Township, West Chester is about 18 miles north of Cincinnati and is included in the Cincinnati metropolitan area. Exits 19, 21 and 22 off Interstate 75 serve West Chester.