Great East Lake is an water body located in
Carroll County, New Hampshire, and
York County, Maine, in the United States. The lake is shared by the towns of
Wakefield, New Hampshire, and
Acton, Maine, with 45% of its surface area in Acton and 55% in Wakefield. The lake is the farthest upstream of the five headwater lakes of the
Salmon Falls River, a tributary of the
Piscataqua River. Water from Great East Lake flows out its dam and through the
Newichawannock Canal into Horn Pond, then into the Salmon Falls River below Horn Pond.