State Highway 38 (SH‑38) is a 23.438-mile (37.720 km) east–west state highway in Oneida County, Idaho, United States, that connects 2100 West and Old Highway 37 with Interstate 15 (I‑15), just east of Malad City.

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.