[7] The township also contains a very small portion of Hayes State Park surrounding Round Lake in the southwest corner of the county.

As of the census[1] of 2000, there were 4,102 people, 1,617 households, and 1,151 families residing in the township.

24.1% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older.

Manchester Township is served by three separate public school districts.

The southeast portion of the township is served by Clinton Community Schools in Clinton in Lenawee County, while the southwest corner of the township is served by Columbia School District to the west in Jackson County.