The collision happened just before 4:30 a.m. near the intersection of Studebaker and Foster roads.
The victim was identified as 20-year-old Daniel Ortiz of Norwalk. He died at the scene.
Authorities are looking for the hit-and-run driver and the vehicle involved in the accident.
Anyone with information was asked to call the Los Angeles County Sheriff's Department Norwalk Station at (562) 863-8711.