Denis Joseph Healy (April 29, 1912 – July 1, 1971) was an American explorer who was a member of the United States Antarctic Service Expedition.

Healy and Lytton Musselman were members of the Southeastern-Eternity Range Survey trail party, led by J. Glenn Dyer.

The trail party departed East Base with Finn Ronne and Carl R. Eklund on November 6, 1940, separated from Ronne and Eklund on November 21, and proceeded on their expedition until their return to East Base on December 11.

[4] Upon his separation from the military Healy settled in Pembroke, Massachusetts, and spent the remainder of his life working as a poultry farmer.

Cape Healy at the entrance to Lamplugh Inlet, on the east coast of Palmer Land, Antarctica, is named for him.