Lake islands (or island groups) are islands located within lakes. They are a type of island formed by various processes such as erosion, earthquakes, meteorite impacts, sedimentation, and volcanic activity.
Manitoulin Island, Canada
René-Levasseur Island, Canada
Olkhon Island, Russia
Samosir Island, Indonesia
Royal Island, United States
Ukerewe, Africa
Saint Joseph Island, Canada
Drummond Island, United States
Idjwi, Democratic Republic of the Congo
Ometepe Island, Nicaragua.