The local coroner has been notified, and arrangements will be made for a post-mortem examination.
Gardaí are appealing for witnesses following a fatal, single vehicle road traffic collision on the Clane Road (R403) in Celbridge, which occurred at approximately 10.30pm last night.
The driver and sole occupant of the car, an adult male teenager (19), was fatally injured.
The local coroner has been notified, and arrangements will be made for a post-mortem examination.
The road remains closed this morning to allow for an examination of the scene by Garda Forensic Collision Investigators.
Gardaí are appealing for any witnesses to this collision to come forward.
Any road users who may have camera footage (including dash-cam) and were travelling in the area at the time are asked to make this footage available to investigating Gardaí.
Anyone with any information is asked to contact Leixlip Garda Station on 01 666 7800.

Seven Killed In Deadliest Day On Irish Roads In Nearly A Decade - Baltinglass Man Urges Tougher Penalties
Ireland Blind At Sea As Navy Lacks Sub-Surface Capability, Says Former Kildare TD
Kfm Obituary Notices (Sunday)
Analysis: Damning Reports Detail Rot, Fire Risks And Rodents At "Temporary" Celbridge Primary School
Major Curragh Community College Project Moves Ahead After Years Of False Starts
Plans For Walking Trail Within Castletown House Lands Under Consideration Subject To Removal Of Laurel