Police say the boy was struck by a pick-up truck on Rose Drive, just north of Castner Drive Friday night.
The driver, who remained on scene and cooperated with the investigation, was not arrested or cited, police said. The teen was taken to Western Medical Center in Santa Ana, where he was pronounced dead. His identity was not released.
If you have any information about this incident, you're urged to contact Placentia police at (714) 933-8258.