Eureka Township is a charter township of Montcalm County in the U.S. state of Michigan. The population was 4,211 at the 2020 census, Eureka Township was established in 1850.
Geography
The township is in southern Montcalm County, bordered to the north by Montcalm Township, to the northeast by Sidney Township, to the east by Fairplain Township, to the south by Ionia County, and to the west by Kent County. The city of Greenville occupies what was originally the northern part of Eureka Township.
State highways M-57 and M-91 cross the township, intersecting in Greenville. M-57 leads east to Carson City and west to U.S. Route 131 near Edgerton, while M-91 leads south to its terminus near Belding and north to Lakeview.
According to the U.S. Census Bureau, Eureka Township has a total area of , of which are land and , or 2.89%, are water.
As of the census