Winnisquam Lake is located in Belknap County in central New Hampshire, in the communities of Sanbornton, Belmont, Laconia, and Meredith. At 4,264 acres, it is the third-largest lake located entirely in New Hampshire. The lake is primarily fed by the outlet from Lake Winnipesaukee, and Winnisquam's outlet is the Winnipesaukee River, flowing to the Merrimack River. www. ... Official language(s) English Capital Largest city Concord Manchester Area  Ranked 46th  - Total 9,359 sq. ... Sanbornton is a town located in Belknap County, New Hampshire. ... Belmont is a town located in Belknap County, New Hampshire. ... Laconia is a city located in Belknap County, New Hampshire. ... Meredith is a town located in Belknap County, New Hampshire. ... An acre is an English unit of area, which is also frequently used in the United States and some Commonwealth countries. ... Lake Winnipesaukee at Sunset The largest lake in New Hampshire, Lake Winnipesaukee is the sixth largest natural lake lying within the United States. ... The Winnipesaukee River runs from Silver Lake, in Belmont, New Hampshire to Franklin, New Hampshire, where it joins the Pemigewasset River to form the Merrimack River. ... The Merrimack River, formed by the confluence of the Pemigewasset River (left) and Winnipesaukee River (right) is shown on a map of the northeastern United States The Merrimack River (or Merrimac River, an earlier spelling that is sometimes still used) is a 110-mile-long (177-kilometer-long) river in...