Oneida is a city in Knox County, Illinois, United States. The population was 700 at the 2010 census, down from 750 in 2000. It is part of the Galesburg Micropolitan Statistical Area.
Oneida, Illinois
Knox County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 49,967. Its county seat is Galesburg.
Knox County Courthouse