Mr David was unable to track down the wounded animal before dark and so he planned to return the next morning to find the bull with the landowner.
The 66-year-old hunter, of Hillsboro, managed to find the wounded bull at around 9.15am on Sunday.
"The elk charged David and gored him in the neck with its antlers," said Oregon State Police.
"The landowner attempted to help David but he sustained fatal injuries and died".
Police added that the elk was killed and its meat was donated to the Tillamook County Jail following the investigation.
According to the National Geographic, a male bull elk's can reach up to four feet above it's head so that the animal stands at nine feet tall.