Juminda peninsula is peninsula in Harju County, Estonia. Peninsula is bordered by Hara bay and Kolga bay. The length of peninsula is about 13 km and width about 6 km.
In 1941, one of the deadliest naval battles in the world took place near the Juminda peninsula. It was part of the Soviet evacuation of Tallinn when the Soviets planned to evacuate parts of the Baltic Fleet from Tallinn to Leningrad but were stopped by a 32 km long strip of mines placed by the Germans and Finns. The convoys consisted of a few hundred ships, some of them being passenger ships carrying Estonian and Latvian citizens. According to historian Mati Õun, 52 ships were sunk with up to 25,000 people on board. In 1972 a memorial stone was established in Juminda.