It happened around 9:45 a.m. Monday at the Meadows at Middlesex in Plainsboro.
Rescuers on the scene say the man became trapped after the tractor tipped over into some water near the 2nd hole.
The man was pulled from the water with a severe injury to one of his legs.
A helicopter was dispatched the fly the victim to the hospital.
Chopper 6 HD was over the scene as a backhoe was used to lift the tractor from the water and onto dry land.