Angelokastro (Castle of the Angel) is a Byzantine castle on the island of Corfu. It is located at the top of the highest peak of the island's northwest shoreline. It stands 305 m on a steep cliff above the sea.

The castle never fell, despite frequent sieges and attempts at conquering it through the centuries, and played a decisive role in defending the island against pirate incursions and during three sieges of Corfu by the Ottomans, significantly contributing to their defeat.