Seymour Lake is located in the town of Morgan in Orleans County, Vermont, United States, an area known as the Northeast Kingdom.

[1] The lake is on a tributary of the Clyde River in Orleans County, Vermont.

It is owned by Citizens Utilities Company and is located in Charleston, Vermont.

[5] The Aquatic Invasive Species Prevention Program[6] of Seymour Lake was founded in 1999 for the protection against of Eurasian water milfoil (Myriophyllum spicatum) and zebra mussels (Dreissena polymorpha), which have already infested many nearby lakes but have not been found in Seymour.

Staffing is provided by greeters at the state fishing access, located in Morgan Center in the northeastern corner of the lake, to inspect watercraft from other water bodies, 7 days/week, 12 hours/day (13 on Saturdays) from Memorial Day until the end of fishing season (October 31), with a hot water Watercraft Decontamination Station[7] Patrolers from the Vermont Invasive Patroller program[8] examine the bottom of the lake for aquatic vegetation and identification of potential aquatic invasive species.