Lakes / New Jersey / Monmouth County / Swimming River Reservoir
Swimming River Reservoir, New Jersey
576.97 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Jersey
40.32 degrees N, 74.14 degrees W - Monmouth 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 Swimming River Reservoir Stacks Up
- Larger than 95% of the 295 lakes counted in New Jersey.
- The largest lake in Monmouth County among those counted.
- About 28 miles from Princeton, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Shadow Lake | Monmouth | 3.2 mi | 84.02 acres |
| Lake Lefferts | Monmouth | 8.5 mi | 75.47 acres |
| Natco Lake | Monmouth | 8.6 mi | 41.02 acres |
| Deal Lake | Monmouth | 8.7 mi | 166.05 acres |
| Glendola Reservoir | Monmouth | 8.9 mi | 120.83 acres |
| Lake Como | Monmouth | 12 mi | 36.57 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Swimming River Reservoir
How Big Is Swimming River Reservoir?
Swimming River Reservoir covers 576.97 acres in Monmouth County, New Jersey.
What Is the Largest Lake in Monmouth County?
Swimming River Reservoir is the largest lake in Monmouth County, at 576.97 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 167762192). Verified October 30, 2026.