Federal Aviation Administration spokeswoman Arlene Salac said the two general aviation planes hit each other over Hammonton Municipal Airport shortly after 1 p.m. At the time, they were performing maneuvers in a designated airspace for such maneuvers.
Salac said one pilot was killed, but the other was able to safely eject from their plane.
However, it wasn't immediately known if the second pilot sustained any injuries.
It was not immediately clear what caused the crash, and FAA investigators and Hammonton police remained at the scene late Saturday afternoon.
The names of the pilots, who were alone in their respective planes, were not available.