Lake Winnisquam is in Belknap County in the Lakes Region of central New Hampshire, United States, in the communities of Meredith, Laconia, Sanbornton, Belmont, and Tilton. At 4,214 acres (1,705 ha), it is the fourth-largest lake entirely in New Hampshire. The lake is roughly triangular in shape, with the vertexes pointing north, east, and south. The lake lies along the path of the Winnipesaukee River, which enters the lake from its eastern corner and carries water from Lake Winnipesaukee via Paugus Bay and Opechee Bay. The river also flows south out of Winnisquam's southern corner, eventually joining the Merrimack River. The lake extends several miles north from the course of the Winnipesaukee River, which forms the lake's southeastern side, with the northern point being formed by the conf