Cortegada is an almost tidal island in a coastal inlet near Pontevedra in Galicia, Spain. It is part of the Atlantic Islands of Galicia National Park.

A tidal island is a raised area of land within a waterbody, which is connected to the larger mainland by a natural isthmus or man-made causeway that is exposed at low tide and submerged at high tide, causing the land to switch between being a promontory/peninsula and an island depending on tidal conditions.