The following is a description of islands in the Detroit River. The Detroit River is a major waterway in the Great Lakes system, and it flows for 24 nautical miles (44 km; 28 mi) from Lake St. Clair south to Lake Erie. The river serves as a major shipping channel, jointly controlled by the United States and Canada, and it is a major component of the Canada–United States border. The majority of islands are on the American side of the river, which are all within Wayne County in Michigan. The Canadian islands are part of Essex County in Ontario. There are no islands in the Detroit River that are divided by the international border, as Michigan and Ontario share no land borders at any point.
Most of the islands are very small and uninhabited, and many of these islands around the southern portion of the river serve as nature reserves as part of the Detroit River International Wildlife Refuge. The largest and most populated island is Grosse Ile, and many islands are part of Grosse Ile Township. Several islands were also artificially created by canals, such as several islands within the city of Gibraltar, as well as Elizabeth Park and Zug Island.