Jose Rios, 22, was ejected from his car and died at the scene, Idaho State Police report.
Rios was driving south on Aviation Way from Franklin Road about 6:40 p.m. when he lost control of his Dodge Charger, which went off the right shoulder and overturned several times, ISP reports.
Rios was not wearing a seat belt. Passenger Ricky Gonzalez, 22, of Caldwell was wearing a seat belt and was taken to Saint Alphonsus in Nampa with injuries described as not life-threatening, ISP reports.
The crash is under investigation.