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is a town in Orleans County, Vermont, United States. The population was 4,604 at the 2000 census. The town contains four unincorporated villages: Beebe Plain, Clyde Pond, Lake Salem and North Derby; and two incorporated villages: Derby Center and Derby Line. The Town of Derby encompasses the largest area in the county.
According to the United States Census Bureau, the town has a total area of 57.6 square miles (149.2 km
) of it (13.87%) is water. The town lies in the northernmost part of Orleans County, bounded north by Canada, east by Holland, southeast by Morgan and Charleston, southwest by Coventry and Brownington, and west by Lake Memphremagog.
Lake Salem is within the town boundaries. Clyde Pond was formed by daming the Clyde River.