Bloomer Township is a civil township of Montcalm County in the U.S. state of Michigan. As of the 2020 census, the township population was 6,352,

Geography

The township is in the southeast corner of Montcalm County, bordered to the east by Carson City and Gratiot County. Ionia County is to the south, and Clinton County borders the southeast corner of the township. It is about east of Greenville, Montcalm County's largest city. The Carson City Correctional Facility, with a capacity for 2,526 prisoners, is in the eastern part of the township.

According to the U.S. Census Bureau, the township has a total area of , of which , or 0.38%, are water.

As of the census