The bodies were discovered close to the site where the light aircraft went down around 11 pm in a thickly forested area of the Bluff.
Police said it appeared there were two people on board.
Law enforcement officers and fire crews were dispatched to the scene of the crash.
Cayman Brac’s District Commissioner Ernie Scott said little was known about the aircraft’s origins.
He said, however, the flight did not originate from Cayman Brac.
“Nobody knows where the plane came from,’ he stressed.
The Royal Cayman Islands Police and the Cayman Islands Civil Aviation Authority are continuing their investigations.