Lakes / New Jersey / Mercer County / Mercer County Lake
Mercer County Lake, New Jersey
290.09 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Jersey
40.27 degrees N, 74.65 degrees W - Mercer 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 Mercer County Lake Stacks Up
- Larger than 89% of the 295 lakes counted in New Jersey.
- The largest lake in Mercer County among those counted.
- About 6 miles from Princeton, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Grovers Mill Pond | Mercer | 3.8 mi | 31.14 acres |
| Plainsboro Pond | Mercer | 5.1 mi | 37.56 acres |
| Gropp Lake | Mercer | 5.7 mi | 30.64 acres |
| Carnegie Lake | Mercer | 6.0 mi | 243.89 acres |
| Spring Lake | Mercer | 6.9 mi | 62.02 acres |
| Rosedale Lake | Mercer | 7.1 mi | 29.87 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mercer County Lake
How Big Is Mercer County Lake?
Mercer County Lake covers 290.09 acres in Mercer County, New Jersey.
What Is the Largest Lake in Mercer County?
Mercer County Lake is the largest lake in Mercer County, at 290.09 acres.
Largest Lakes in New Jersey
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Hopatcong | Sussex | 2,493.66 acres | - |
| 2 | Round Valley Reservoir | Hunterdon | 2,272.23 acres | - |
| 3 | Wanaque Reservoir | Passaic | 1,971.09 acres | - |
| 4 | Van Sciver Lake | Burlington | 1,396.61 acres | - |
| 5 | Spruce Run Reservoir | Hunterdon | 1,354.88 acres | - |
All 295 New Jersey lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 167295446). Verified October 30, 2026.