Lake Willoughby is located in the town of Westmore in Orleans County in the Northeast Kingdom of Vermont, United States.

The village of Westmore is located on the east side, at the confluence area of Mill Creek which drains the waters of Long Pond.

The "state Fish and Game Department" bought the dam rights to allow rainbow trout to swim upriver.

The shoreline of Lake Willoughby almost resembles a Norwegian fjord, and as a result is a popular destination for photographers and tourists.

[6] Other mountains in territory of Westmore, Vermont are on: Willoughby is listed as a National Natural Landmark.

[7][8] Willoughby contains rainbow trout (wild and stocked), lake trout, landlocked Atlantic salmon (mainly stocked), rainbow smelt, burbot, yellow perch, longnose sucker, white sucker, lake chub, common shiner, and round whitefish which is a native species of extremely limited distribution in Vermont.

[10] More than 100 bird species have been recorded around the lake including thrushes, warblers, hummingbirds, jays, finches, loons, herons and gulls.

"[13][14] The toponym "lake Willoughby" was officially recognized on September 1, 1992, by GNIS (Geographic Names Information System) of United States.

[16] It takes its name from a painted image of a devil on the front of the rock facing out toward the lake.