Eastmanville is an unincorporated community at the southern edge of Polkton Township of Ottawa County in the U.S. state of Michigan. It is centered on the intersection of 68th Ave. and Leonard St. on the north bank of the Grand River at 43°01′00″N 85°57′23″W / 43.01667°N 85.95639°W. 68th Ave. was the first bridge over the Grand River east of Grand Haven until October, 2015, when the first span of the bypass bridge was opened in Robinson Township. A junction with I-96 in Coopersville is three miles to the north and M-45 in Allendale is three miles south. Westbound Leonard goes to Spring Lake, while eastbound goes to Grand Rapids.