Largest lakes & reservoirs in New Hampshire by shoreline length
The length of the exterior shoreline around a lake is measured at the lake’s normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal. A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.When known, the shoreline miles that we report in our statistics include only the lake’s exterior shoreline, and exclude the shorelines of islands located within a lake’s boundaries. In lakes with many islands, those islands’ combined shorelines may exceed a lake’s exterior shoreline.
You can find many of the world’s longest-shoreline lakes on LakeLubbers. Note: For some lakes, "Longest Shorelines" data is unknown or does not apply, so this table may display fewer lakes than the total 40 articles we have published for New Hampshire lakes.
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Below are lakes within USA > US New England Region > New Hampshire > Compared by longest shoreline length in miles. This list does not represent all lakes in New Hampshire, only the 40 New Hampshire lake articles we have published on the LakeLubbers website.
Lake name  |
Shoreline length in miles |
Lake description |
|---|---|---|
| Lake Winnipesaukee, NH (Lakes Region, NH, New Hampshire, US New England Region, USA) |
240 mi | By far the largest lake in the state, Lake Winnipesaukee covers an incredible 44,586 New Hampshire acres. The lake is the third largest lake in all of… |
| Squam Lake, NH (Lakes Region, NH, New Hampshire, US New England Region, USA) |
61 mi | Also known as Big Squam Lake, Little Squam Lake Big Squam Lake,the second-largest lake located entirely in New Hampshire, covers almost 6,800 acres in the state’s Lakes Region. Dotted with historic… |
| Umbagog Lake, ME/NH (Great North Woods Region, NH, Lakes & Mountains Region, ME, Maine, New Hampshire, US New England Region, USA) |
50 mi | Also known as Rangeley Lakes Umbagog Lake straddles about 11 miles of the Maine-New Hampshire border. This 7,850-acre lake lies partly in the Rangeley Lakes region of western Main… |
| Lake Sunapee, NH (Dartmouth-Lake Sunapee Region, NH, New Hampshire, US New England Region, USA) |
30 mi | Also known as Sunapee Lake Lake Sunapee has been a popular vacation destination since the heyday of passenger railroads and steamships. The lake’s clear waters and beautiful sce… |
| Winnisquam Lake, NH (Lakes Region, NH, New Hampshire, US New England Region, USA) |
28 mi | Also known as Lake Winnisqam Located in New Hampshire’s “Lakes Region”, Winnisquam Lake holds the distinction of being the fourth-largest lake located completely within the NH sta… |
| Newfound Lake, NH (Lakes Region, NH, New Hampshire, US New England Region, USA) |
22 mi | Comfortably situated in New Hampshire’s famous Lakes Region, Newfound Lake is the third-largest lake located entirely within the state’s boundaries. I… |
| Lake Wentworth (Lakes Region, NH, New Hampshire, US New England Region, USA) |
20 mi | One of the prettiest lakes in New Hampshire’s Lakes Region is Lake Wentworth. All too often overlooked as tourists flock to nearby Lake Winnipesaukee,… |
| Great East Lake, ME/NH (Lakes Region, NH, Maine, New Hampshire, Southern Coast Region, ME, US New England Region, USA) |
12 mi | Great East Lake is a paradise for anyone who enjoys a relaxing time. With over 1700 acres of water and 12 miles of shoreline, Great East Lake is known… |
| Merrymeeting Lake (Lakes Region, NH, New Hampshire, US New England Region, USA) |
11 mi | Beautiful Merrymeeting Lake in the town of New Durham, New Hampshire was formed by an impoundment on the Merrymeeting River in 1923. At normal water l… |
| Ossipee Lake, NH (Lakes Region, NH, New Hampshire, US New England Region, USA) |
10 mi | Ossipee Lake covers an impressive 3,245 acres in the Lakes Region of New Hampshire, making it the sixth-largest lake contained entirely within the sta… |
| Lake Waukewan (Lakes Region, NH, New Hampshire, US New England Region, USA) |
8 mi | Lake Waukewan is set within the heart of New Hampshire’s Lakes Region, where its sparkling 928 acres lure visitors seeking to escape to a small town a… |
| Bow Lake (Lakes Region, NH, New Hampshire, US New England Region, USA) |
7 mi | Also known as Bow Lake New Hampshire’s Bow Lake is located about 30 miles south of better-known Lake Winnipesaukee in the state’s Lakes Region. Bow Lake has its own special… |