St. George's Island is one of the main islands of the territory of Bermuda and lies within St. George's Parish (originally designated the General Land, in distinction to the other eight parishes subdivided as private shares) at the East End of the archipelago (actually the northeast of the territory).

St. George's Town, the original colonial capital, is located on the southern shore near the eastern end of the island.

Originally called King's Island, it was the first part of Bermuda to be extensively colonised, and the town of St. George's contains many of the territory's oldest buildings.

It is beside Gates' Bay, where the first English settlers ship wrecked in the Sea Venture in 1609.

The island is nearly split in two by the deep indentation of Mullet Bay, with the western part of the island connected to the rest by a narrow isthmus.