Atwater is a census-designated place (CDP) in Portage County, Ohio, United States.

As of the 2020 census, the CDP had a population of 776.

[3][4] Atwater is part of the Akron Metropolitan Statistical Area.

A post office called Atwater has been in operation since 1824.

[5] The community and township have the name of Caleb Atwater, a landowner in the Connecticut Western Reserve.