Commercial property over looking the Soo Locks in Downtown Sault Saint Marie. Great investment potential. Sault Ste Marie is the county seat of Chippewa County, Michigan, U.S.A. Situated on the Northeastern end of Michigan's Upper Peninsula, it borders U.S. - Canada with the St. Mary's River separating the twin city, Sault Ste. Marie, Ontario. It is the second-most populous city of the Upper Peninsula with a population of 14,144 in the 2010 census. Based more on the extensive industry developed in the 20th century and an economy with closer connections with other communities, the Canadian Sault Ste. Marie is much larger. Located across from the commercial property is the International shipping channels of the Soo Locks Visitors to the area enjoy the freighters passing through the locks, the historic downtown area, the St. Mary's River, and International Bridge.