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 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.

Michigan

Belle Isle

Belle Isle () is a island in the northeastern portion of the Detroit River just north of Downtown Detroit. Belle Isle sits at an elevation of above sea level, and the island has also gone by several historic names. It is the northernmost island in the river just downstream from Lake St. Clair. Because of the curve in the river, Belle Isle is just west of (Southbound on the river) the Canadian Peche Island, which is the easternmost and first island in the river heading South. It is the third-largest island in the river after Grosse Ile and Fighting Island. The island is within the city limits of Detroit but is administered by the Michigan Department of Natural Resources, as the island was designated as a state park named Belle Isle Park in 2014. The island is connected to the mainland by the MacArthur Bridge, which carries East Grand Boulevard and connects to East Jefferson Avenue. Belle Isle has no permanent population.

The island is a very popular tourist destination that contains a number of historic structures and events. The entire island is listed as a historic district on the National Register of Historic Places and also as a Michigan State Historic Site. The island itself also contains several lakes, including the Blue Heron Lagoon, Lake Muskoday, Lake Okonoda, Lake Takoma, and several artificial canals. These lakes also contain several unnamed recursive islands (islands within an island).

Calf Island

Calf Island () is an island off the southwest coast of Grosse Ile. The island sits at an elevation of above sea level. The island, which is within Grosse Ile Township, is uninhabited and serves primarily as a nesting location for migrating birds. In 2002, Calf Island became part of the Detroit River International Wildlife Refuge.

Celeron Island

Celeron Island () is a island near the mouth of the Detroit River at Lake Erie. Celeron Island is the southernmost island within Grosse Ile Township and sits at an elevation of above sea level. Due to erosion, it now comprises two separate islands. Celeron Island is uninhabited and administered by the Michigan Department of Natural Resources, as the island was included into Pointe Mouillee State Game Area in 1976.

Cherry Island

Cherry Island () is an uninhabited island within Brownstown Charter Township just south of the city of Gibraltar. Also referred to as Cherry Isle, the island sits at an elevation of above sea level. The island is part of Lake Erie Metropark and contains the park's boat launch. Cherry Island is also listed by the GNIS as an unincorporated community and populated place.

Edmond Island

Edmond Island () is an artificial island within the city of Gibraltar. It separated from the mainland by a narrow canal and is connected to the mainland by a single bridge that carries Young Drive. The island sits at an elevation of above sea level. It is one of the main populated islands of Gibraltar, and it is sometimes spelled as Edmund Island.

Elba Island

Elba Island () is an elongated island off the southeast coast of Grosse Ile and is administered by Grosse Ile Township. It is separated from Grosse Ile by the Oldani Marsh. Elba Island contains a single roadway and is connected by a single bridge to Grosse Ile. The island sits at an elevation of above sea level.

Elizabeth Park

Elizabeth Park () is an artificial island within the city of Trenton. The island is located on the western shores of the Trenton Channel and sits at an elevation of above sea level. Once connected to the mainland, it was set off by the construction of a canal by landowner Giles Bryan Slocum in the mid-nineteenth century. The island became known as Slocum's Island, and the property was donated to the county in 1918. The Slocum's Island name has now largely fallen into disuse. Today, the island encompasses the Elizabeth Park on the northern end and the Trenton Channel Power Plant on the south. The two are separated by the Grosse Ile Parkway, which carries the Wayne County Bridge leading to Grosse Ile.

Fox Island

Fox Island () is a small and uninhabited island located off the southeast coast of Grosse Ile just east of Elba Island. The island is privately owned and part of Grosse Ile Township. The island sits at an elevation of above sea level.

Grassy Island

Grassy Island () is a island just north of Grosse Ile and west of Fighting Island. The uninhabited island is part of the city of Wyandotte. Originally, the island was much smaller, but it served as a disposal facility for millions of cubic yards of sediments that were dredged from the expanding of the River Rouge. In 2001, Grassy Island was an inaugural addition to the Detroit River International Wildlife Refuge, although access to the island is restricted and difficult.

Grassy Island sits at an elevation of . It once contained the former Grassy Island Light. Grassy Island should not be confused with another island on the opposite side of the river named Grass Island, which is part of Ontario.

Grosse Ile

Grosse Ile () is the largest island in the Detroit River. The island sits at an elevation of above sea level in the southern portion of the river. The island itself has no precise area or population statistics, although it is approximately long and wide. Grosse Ile is the main island within Grosse Ile Township, and it is often referred to as the "big island" or "main island" to distinguish it from the township as a whole, which contains a dozen individual islands.

Grosse Ile connects to the mainland by the Wayne County Bridge in the middle of the island and the Grosse Ile Toll Bridge on the northern end. The Grosse Ile Municipal Airport is located on the southern end of the island. The island also contains a number of smaller bridges that traverse the island's canals and connect to the smaller islands to the south. Grosse Ile contains numerous historic structures and is primarily residential with little economic development. The island is bisected by the Thorofare Canal and another canal that separates the undeveloped northern portion of the island referred to as Hennepin Point. The Gibraltar Bay Unit of the Detroit River International Wildlife Refuge is located in the southeast portion of the island.

Hall Island Hall Island () is an inhabited island within the city of Gibraltar. It is centrally located within the city just east of Main Island and north of Edmond Island. It is connected to the mainland and Main Island by two bridges along Stoeflet Street.

Humbug Island

Humbug Island () is an elongated island within the city of Gibraltar just northwest of Calf Island. It is included in the much larger Humbug Marsh, which was included into the Detroit River International Wildlife Refuge in 2004. The island is uninhabited and inaccessible, and it is noted as the last undeveloped shoreline on the American side of the Detroit River.

Hickory Island

Hickory Island () is the southernmost populated island within Grosse Ile Township. It sits at an elevation of above sea level. The island contains a single bridge connecting to Meso Island to the north leading to Grosse Ile. The Grosse Ile Yacht Club is located on Hickory Island.

Horse Island

Horse Island () is a narrow and elongated island within the city of Gibraltar. It is the city's southeasternmost island and sits at an elevation of above sea level. The island is densely populated and contains a single roadway. It is connected to the mainland by the Horse Island Drive Bridge, which is long and was constructed in 1925. The island received its name from early settlers who would leave their horses to feed and mate on the island during the summer months.

Main Island Main Island () is the largest and most-populated island within the city of Gibraltar. It is separated from the mainland by a narrow canal. The island is connected to the mainland at the north end by the historic Gibraltar Road–Waterway Canal Bridge, which is long and was constructed in 1932. Main Island also connects to Hall Island to the west via Stoflet Street, as well as connecting to Horse Island to the southeast via Island Drive.

Mamajuda Island

Mamajuda Island () was an island located just east of the northern tip of Grosse Ile (Hennepin Point) within Grosse Ile Township. The island was once in size and contained the historic Mama Juda Lighthouse, which was first built in 1849. The lighthouse was lost by increased erosion in the 1950s, and the entire island itself disappeared soon after. The island was also known as Mammy Juda Island and sits at an elevation of above sea level. Although the island is gone, it is still listed on some online maps and may surface during times of low water levels.

Meso Island

Meso Island () is a populated island in southeast Grosse Ile Township. The island sits at an elevation of above sea level. Hickory Island is to the south, and Meso Island connects to Grosse Ile by a single bridge. Sugar Island is just east of Meso Island.

Mud Island

Mud Island () is a island within the city of Ecorse. The island was donated by the National Steel Corporation and is the northernmost unit included in the Detroit River International Wildlife Refuge. Mud Island is just north of Grassy Island, and public access to the island is prohibited. It sits at an elevation of above sea level.

Powder House Island

Powder House Island () is a very small uninhabited island in southeast Grosse Ile Township. It is located just northeast of Fox Island in the middle of the river near the international border. Powder House Island sits at an elevation of above sea level. The island may also be referred to as Dynamite Island.

Round Island

Round Island () is an uninhabited island of Grosse Ile Township. It sits at an elevation of above sea level. Unlike other islands at the southern tip of Grosse Ile, Round Island is undeveloped. It is separated from Grosse Ile by a narrow canal that is used for docking boats at the Ford Yacht Club.

Stony Island

Stony Island () is uninhabited island within Grosse Ile Township just east of Grosse Ile and west of the international border from Crystal Island. Stony Island sits at an elevation of above sea level. The island's unusual shape and stony composition are the result of millions of cubic yards of sediment that were dredged out of the middle of the Detroit River to provide a deep shipping lane. The island has also been reinforced and surrounded by numerous breakwater structures to protect the artificial wetlands. The island has undergone this restoration project with funding from the National Oceanic and Atmospheric Administration. Most of the island is included as part of Pointe Mouillee State Game Area.

Sturgeon Bar