The Department of Foreign Affairs and Trade confirmed it was providing consular assistance to the man’s family.
“We send our deepest condolences to the family,” a spokesperson said.
A spokesperson for Port Moresby’s Pacific International Hospital told the ABC the 48-year-old man was brought in on Sunday night after fainting on the track.
His colleagues attempted CPR but he was pronounced dead.
The Kokoda Track Authority manages the trail where an estimated 625 Australians were killed fighting and more than 1600 were wounded in the bloody five-month campaign fought between Australian and Japanese soldiers in World War II.
It warns trekkers the trail is a “challenging experience both physically and emotionally”.
