New Trier is a city in Dakota County, Minnesota, United States. The population was 112 at the 2010 census. Minnesota Highway 50 serv…New Trier is a city in Dakota County, Minnesota, United States. The population was 112 at the 2010 census. Minnesota Highway 50 serves as a main route in the community. A post office called New Trier was established in 1867, and remained in operation until it was discontinued in 1933. A share of the early settlers being natives of Trier, Germany caused the name to be selected.
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