The Town of New Chester is located in Adams County in the U.S. state of Wisconsin.

The unincorporated communities of Brooks and Grand Marsh are located in the town.

The town of New Chester is located on the eastern border of Adams County.

The Federal Correctional Institution, Oxford, with approximately 1,000 inmates, is located north of the geographic center of the town.

29.9% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.