Prosecutors say the body of 21-year-old Caroline Bump was found around 1:39 a.m. Tuesday in the area of Glenside Road in Millville.
Investigators believe Bump may have been struck by a vehicle on Monday night around 11:11 p.m. The body was found sometime after by a passing motorist.
Authorities are searching for a 2003 Silver Infinity G35 with New Jersey registration E41RLB.
Investigators believe there's damage to the driver's side headlight, windshield and front bumper.
Further details on how the woman died have not been released.
Anyone with information is asked to call Detective Christopher Johnson of the Cumberland County Prosecutor's Office at 609-579-1431.