Oneida County is a county located in the U.S. state of Idaho. As of the 2020 Census the county had a population of 4,564. The county seat and largest city is Malad City. Most of the county's population lives in Malad City and the surrounding Malad Valley.

Malad City is the only city in Oneida County, Idaho, United States. In 2024 the population was around 2,239 people., up from 2,158 in 2000.