Miranda Harper, 20, of Enid died over the weekend three miles east of Stigler on Oklahoma Highway 9, according to the Oklahoma Highway Patrol.
Harper was passing another vehicle in the westbound lane when her car struck an oncoming vehicle head-on.
The other vehicle was a 2006 Dodge Ram driven by Justin Moore, 21, of Stigler. He and his passenger, Sierra Grant, 18, of Stigler, were admitted to Mercy Hospital in Fort Smith with various injuries.
Harper was pinned in her vehicle and was not wearing a seatbelt. Moore and Grant were wearing their seatbelt.