The collision happened just before 6 a.m. in the area of Stanford Avenue and Dale Street.
Residents of the area said the man was often seen walking in the neighborhood.
Surveillance footage from a nearby home has footage of the suspect fleeing the scene after hitting the victim, police said. Authorities said the vehicle ran a stop sign.
The victim was pronounced dead at the scene.
The public is asked to call Garden Grove police if they have any information about the vehicle or the suspect.