Derby Line is an incorporated village in the town of Derby in Orleans County, Vermont, United States, slightly north of the 45th parallel, the normal U.S.-Canada boundary. The population was 776 at the 2000 census.
The village is located on the Canada–United States border and is contiguous with the district of Rock Island in the town of Stanstead, Quebec.
Notable buildings include the Haskell Free Library and Opera House.
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