Day Township is a civil township of Montcalm County in the U.S. state of Michigan. As of the 2020 census, the township population was 1,141.

  • Westville is an unincorporated community on the western boundary of the township at , about west of McBride and about north of Stanton. A post office was established on May 2, 1872, with Eli M. Mallet as the first postmaster. The community was platted and recorded as "Westville" by Daniel West. The post office continued to operate until October 31, 1907.
  • The city of Stanton is situated at the southwest corner of the township and incorporates most of section 31. The Stanton post office, with ZIP code 48888, also serves most of southern Day Township.

Geography

Day Township is in northeastern Montcalm County, bordered to the southwest by the city of Stanton, the county seat. According to the U.S. Census Bureau, the township has a total area of , of which are land and , or 0.24%, are water.

As of the census