Bath Charter Township is a charter township of Clinton County in the state of Michigan in the U.S.. As of the 2020 census, the township populati…Bath Charter Township is a charter township of Clinton County in the state of Michigan in the U.S.. As of the 2020 census, the township population was 13,292, an increase from 11,598 at the 2010 census. It is situated directly north of the city of East Lansing.