A local resident called police to the front of a rural property on Wilton Road at about 2pm on Saturday.
It is understood the pair took off from the nearby Sydney Skydiver's centre, which was also their intended landing zone, but crashed onto a driveway about one kilometre away.
Police have established a crime scene and are investigating.
A spokesman for Sydney Skydivers said the exact cause of the incident was not yet known, but more information would be released once police and safety officers from the Australian Parachute Federation finished their investigations.
