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Sugar Island
Sugar Island (Michigan) is located in Michigan
Sugar Island (Michigan) (Michigan)
Location St. Marys River
Coordinates 46°26′N 84°13′W / 46.433°N 84.217°W / 46.433; -84.217Coordinates: 46°26′N 84°13′W / 46.433°N 84.217°W / 46.433; -84.217
Area 49.44 mi² (128.06 km²)
State Michigan
County Chippewa County
Township Sugar Island Township
Population 683 (as of 2000)

Sugar Island is an island in the U.S. state of Michigan in the St. Marys River between the United States and the Canadian province of Ontario. The entire island constitutes Sugar Island Township in Chippewa County at the eastern tip of the Upper Peninsula. According to the 2000 census there were 683 people living on a land area of 128.06 km² (49.44 sq mi). [1]

The island lies between Lake George and Lake Nicolet, and to the north of Neebish Island and St. Joseph Island. Pine Island is just east of its southern tip.

The island was part of the disputed US-Canadian border dispute settled by the Webster-Ashburton Treaty, and affirmed to be part of the United States when the treaty was signed August 9th, 1842.[2]

In 1945 Sugar Island was nominated a possible location for the headquarters of the United Nations.[3]

The island has large undeveloped areas, and both the Bay Mills Indian Community and the Sault Tribe of Chippewa Indians have interests on the island. The Sault Tribe consider it to be part of their ancestral homelands.

The University of Michigan Biological Station operates the Chase Osborn Preserve, a 3,200 acre (13 km²) tract near the southern tip of the island.


  1. ^ Sugar Island Township, Chippewa County United States Census Bureau
  2. ^ [1]
  3. ^ [2]


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