Half Tide Rock is a small rocky island in south-eastern Australia.

Half Tide Rock may also refer to:

Half Tide Rock, Glannau Porthaethwy, in the Menai Strait, Wales Half tide rock, Lady Isle, in the Firth of Clyde, Scotland. Half-tide rock, nickname of the breastwork monitor warship Half-tide rock, nickname of the Cherokee-class brig-sloop