Chrząszczewo Island (Polish: Wyspa Chrząszczewska) is an island in West Pomeranian Voivodeship, north-western Poland, with an area of 10 square kilometres (3.9 sq mi).
The island is limited by Kamieński Lagoon to the north, Promna Bay to the east, Cicha Bay to the south and the river of Dziwna to the west and south-west.
In the western part of the island, there is a hill called Wyżawa (26.6 metres tall).
In the area located to the north from the village of Chrząszczewo, there is a megalithic burial mound and oil wells.
During World War II, German rocket launchers were stationed on the island.