The 60-year-old was a passenger in a car that was involved in a collision with a van on the Foreglen Road in Claudy at about 16:00 BST on Tuesday.
The injuries sustained by the drivers of the car and the van are not believed to be life-threatening.
Police have appealed for anyone who witnessed the crash to contact them.
A man has died in hospital after he was injured in a car crash in County Londonderry.