The young man was walking along the A96 near Brodie, Forres, when he was hit by a Volkswagen Tiguan car at about 3.30 this morning.
Emergency services attended but the teenager died at the scene.
The driver of the car, a 28-year-old woman, was travelling westbound on the Elgin to Inverness road when the accident happened.
Part of the A96 had to close and diversions were put in place.
Sergeant Craig McNeill at Inverurie said: “I would like to speak to anyone who had seen the teenager walking on the A96 anytime between midnight and 3.30 am when the incident occurred.
“I am especially keen to speak to the driver of a car that was travelling eastwards on the A96 and had passed Brodie just prior to 3.30 am, before the crash.
"I urge this driver to contact police immediately."
Anyone with information or anyone who has dash cam footage of the man walking on the A96 should contact police via telephone number 101 quoting incident number 632 of 29 February 2020.