A human skull was discovered shortly after 9pm on Tuesday in a field in the Tallaght area.
It is has been moved from the scene for forensic examination by experts.
The office of the State Pathologist has been notified and is involved in the investigation.
It’s not known whether foul play is suspected in the death.
The Irish Times reports that missing person records are being studied as part of the effort to identify the victim, and it is thought the remains could be those of a man who died in recent months.