Marcy is an unincorporated community and census-designated place in the town of Marcy, Oneida County, New York, United States. It was first listed as a CDP prior to the 2020 census. The CDP is in eastern Oneida County, in the southern part of the town of Marcy. It is 5 miles northwest of Utica and 11 miles southeast of Rome. The hamlet of Maynard is in the eastern part of the CDP. Interstate 90, the New York Thruway, passes through Marcy, but with no direct access.