Durham Regional Police were called to the scene around 11:56 p.m. A red Chevrolet, driven by a 71-year-old Oshawa man, was driving eastbound on King Street. The skateboarder, a 20-year-old Oshawa man, was riding eastbound as well, police said.
The skateboarder was sent to a local hospital and was later transported to a trauma hospital in Toronto with serious, life-threatening injuries. He remains in serious but stable condition, police said.
The driver was uninjured, according to police.
The scene was closed for several hours while investigators collected evidence.
Anyone with information about this incident or anyone who witnessed this collision is asked to call Det. Const. Todd Gribbons of the Traffic Services Branch at 1-888-579-1520 ext. 5225.
Anonymous information can be sent to Durham Regional Crime Stoppers at 1-800-222-8477 and tipsters may be eligible for a $2,000 cash reward.