Oneida is an unincorporated community and census-designated place (CDP) in Phillips County, Arkansas, United States. Oneida is located along Arkansas Highway 85, north-northeast of Lake View. Oneida has a post office with ZIP code 72369. It was first listed as a CDP in the 2020 census with a population of 13.
It is in the Barton-Lexa School District. Its zoned high school is Barton High School.