Eastmanville is an unincorporated community at the southern edge of Polkton Township of Ottawa County in the U.S. state of Michigan.

The state legislature organized Polkton Township, named after U.S. President James K. Polk, on March 19, 1845.

Although initially prosperous, Eastmanville was soon outpaced by Coopersville, when a railway route developed through that town.

Benjamin Cooper offered a right-of-way through his 640-acres, provided that the depot on his land was the only one within five or six miles in any direction.

A 1941 Michigan Writers Project publication described the community as "a small colony of summer homes on the north bank of the Grand River."