Coffee County Sheriff Steve Graves said the body found at the Bonnaroo campsite Tuesday has been identified as a 26-year-old Fort Payne, Ala., man.
Matthew Lands was identified through fingerprint analysis Thursday. The family was notified at 1 p.m. CDT.
Preliminary autopsy reports from the Tennessee Medical Examiner's Office in Nashville did not determine a cause of death, the sheriff said.
Toxicology report results could take one to two weeks, he said.
Mr. Lands body was found in a single-person tent at around noon CDT Tuesday near a black pickup truck belonging to his father Perry Lands as cleaning crew employees worked in the area.
Matthew Lands' body is still being examined at the office in Nashville.
He is at least the sixth person to die at the annual music and arts festival since it began in 2002.