The man, 28, was walking across the road near Youghal greyhound track when he was struck by a car at around 8pm on Sunday.
The accident happened at Seafield and it’s believed the man, who had lived in Youghal for a number of years, was crossing the road from the grotto towards the greyhound track when he was struck by a silver Renault Laguna.
It is understood the man’s girlfriend witnessed the accident.
The driver of the car stopped at the scene and fully cooperated with gardaí.
The seriously injured man was rushed by ambulance to Cork University Hospital.
It is understood he has a number of serious injuries, including internal injuries.
The car was heading westbound towards the main Cork road when the accident happened.
The road was sealed off overnight and again for several hours yesterday as garda forensic crash scene investigators examined the area.
Detours were put in place while gardaí sought witnesses. “We are appealing for anybody who was in the area at the time and who saw what happened to contact us as soon as possible, if they haven’t done so already,” a garda spokesman said.
Anyone with information is asked to contact Youghal Garda Station on 024 92200, or the Garda Confidential Line 1800 666111.
Meanwhile, in an unrelated incident, gardaí in Youghal arrested five young people after trouble flared at a house party early yesterday morning.
According to the garda spokesman, the row broke out between two factions at the house party on Main St shortly before 4am and it spilled out onto the street.
Damage was caused to the house, a car parked nearby on the street and a large window at a former supermarket was smashed before gardaí were able to quell the disturbance.
They arrested four males and a female at the scene. Only one was over 18. They were interviewed and later released without charge.