Sunfield Township is a civil township of Eaton County in the U.S. state of Michigan. The population was 2,050 at the 2020 census, up from 1,997 at the 2010 census.
Communities
- The Village of Sunfield is the only incorporated municipality within the township.
- Bismark was a post office in the southern part of the township. Brothers Silas P. and J. Hatch Loomis emigrated here in 1835. A post office named Bismark was established on January 26, 1871, with Hatch J. Loomis as the first postmaster, and operated until June 30, 1904.
- Clinton Junction was an unincorporated community that developed around a sawmill. It had a post office from 1871 until 1874.
- Delwood was an unincorporated community in the township. It had a post office from 1882 until 1903.
- Little Venice is an unincorporated community on M-50 (Clinton Trail) and the junction with Dow Road from the north and Granger Highway from the west at
- Shaytown is an unincorporated community approximately one mile northwest of Little Venice at the junction of M-50 (Clinton Trail) and Shaytown Road at
- Woodbury is an unincorporated community in the northwest corner of the township at . It was founded as the Chicago, Kalamazoo and Saginaw Railway came through the area in 1889, and was named for a railroad official. A post office opened on November 18, 1889 with Charles A. Lapo as the first postmaster, and operated until November 15, 1933.