Lincoln Township is a civil township of Newaygo County in the U.S. state of Michigan. The population was 1,292 at the 2020 census.
Communities
- Aetna is an unincorporated community on M-20 in the southwest corner of the township along the boundary with Denver Township at . Aetna was founded in 1867 by a group of sawmill operators. It had a post office from 1870 to 1914.
Geography
According to the United States Census Bureau, the township has a total area of 35.6 square miles (92.2 km<sup>2</sup>), of which 35.1 square miles (90.9 km<sup>2</sup>) is land and 0.5 square mile (1.2 km<sup>2</sup>) (1.35%) is water.
Demographics
As of the census