He was Surendra Sarbhariya, 33, of Nepal.
Emergency services responded to the crash on Shines Rd, near the intersection of Smillies Rd, Island Cliff at 9.30am last Friday.
Oamaru police said the vehicle was discovered upturned and the man was found dead at the scene.
The 33-year-old Nepalese man was a dairy farm worker and had been working on a property near where the crash occurred, Sergeant Blair Corlet said.
His family in Nepal have been advised, he said.