Lakes / New Jersey / Warren County / Ingersoll Reservoir
Ingersoll Reservoir, New Jersey
649.07 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Jersey
40.73 degrees N, 75.10 degrees W - Warren 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 Ingersoll Reservoir Stacks Up
- Larger than 96% of the 295 lakes counted in New Jersey.
- The largest lake in Warren County among those counted.
- About 33 miles from Morristown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Mountain Lake | Warren | 11 mi | 116.63 acres |
| Spruce Run Reservoir | Hunterdon | 11 mi | 1,354.88 acres |
| Delaware Lake | Warren | 13 mi | 37.96 acres |
| Columbia Lake | Warren | 14 mi | 47.95 acres |
| Round Valley Reservoir | Hunterdon | 17 mi | 2,272.23 acres |
| Lake Susquehanna | Warren | 17 mi | 27.92 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Ingersoll Reservoir
How Big Is Ingersoll Reservoir?
Ingersoll Reservoir covers 649.07 acres in Warren County, New Jersey.
What Is the Largest Lake in Warren County?
Ingersoll Reservoir is the largest lake in Warren County, at 649.07 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 167295514). Verified October 30, 2026.