Lakes / New Hampshire / Coos County / First Connecticut Lake
First Connecticut Lake, New Hampshire
3,071.1 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Hampshire
45.09 degrees N, 71.25 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 First Connecticut Lake Stacks Up
- Ranks #10 for surface area among the New Hampshire lakes counted so far - 3,071.1 acres.
- About 109 miles from Laconia, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Round Pond | Coos | 2.7 mi | 59.06 acres |
| Big Brook Bog | Coos | 5.0 mi | 36.08 acres |
| Back Lake | Coos | 5.1 mi | 347.43 acres |
| Lake Francis | Coos | 5.3 mi | 1,933.85 acres |
| Second Connecticut Lake | Coos | 5.7 mi | 1,102.09 acres |
| East Inlet Flowage | Coos | 8.0 mi | 91.92 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About First Connecticut Lake
How Big Is First Connecticut Lake?
First Connecticut Lake covers 3,071.1 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 91152907). Verified October 30, 2026.