Lakes / New Hampshire / Coos County / Third Connecticut Lake
Third Connecticut Lake, New Hampshire
230.8 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Hampshire
45.24 degrees N, 71.20 degrees W - Coos County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Third Connecticut Lake Stacks Up
- Larger than 82% of the 516 lakes counted in New Hampshire.
- About 119 miles from Laconia, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Scott Bog | Coos | 2.1 mi | 88.22 acres |
| East Inlet Flowage | Coos | 4.4 mi | 91.92 acres |
| Big Brook Bog | Coos | 5.4 mi | 36.08 acres |
| Second Connecticut Lake | Coos | 6.0 mi | 1,102.09 acres |
| Round Pond | Coos | 8.3 mi | 59.06 acres |
| First Connecticut Lake | Coos | 10 mi | 3,071.1 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Third Connecticut Lake
How Big Is Third Connecticut Lake?
Third Connecticut Lake covers 230.8 acres in Coos County, New Hampshire.
What Is the Largest Lake in Coos County?
Umbagog Lake is the largest lake in Coos County, at 7,642.5 acres.
Largest Lakes in New Hampshire
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Winnipesaukee | Belknap | 45,654.45 acres | - |
| 2 | Umbagog Lake | Coos | 7,642.5 acres | - |
| 3 | Squam Lake | Belknap | 6,791.2 acres | - |
| 4 | Newfound Lake | Grafton | 4,451.11 acres | - |
| 5 | Lake Winnisquam | Belknap | 4,213.89 acres | - |
All 516 New Hampshire lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 91152589). Verified October 30, 2026.