Jacquinot Bay
Waterfall Bay [NASA">Waterfall Bay, Papua New Guinea">Waterfall Bay [NASA.jpg|thumb|280px|Jacquinot Bay (west) and Waterfall Bay seen from space]
Jacquinot Bay is a bay in East New Britain Province, south-eastern New Britain, Papua New Guinea, at. It is near the mountain where twenty-eight people died when a Royal Australian Air Force plane crashed in November 1945. To its west is the Gasmata Bay and the Wide Bay and Rabaul Bay are situated to the north-east.
Before the Second World War, a palm tree plantation was started here, known as Palmalmal Plantation. The area also had a Catholic Mission, headed by Father Edward Charles "Ted" Harris.
Waterfall Bay lies to the east.