Lakes / New Jersey / Passaic County / Monksville Reservoir
Monksville Reservoir, New Jersey
511.92 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Jersey
41.13 degrees N, 74.31 degrees W - Passaic 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 Monksville Reservoir Stacks Up
- Larger than 94% of the 295 lakes counted in New Jersey.
- About 25 miles from Morristown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Green Turtle Lake | Passaic | 1.7 mi | 44.73 acres |
| Cupsaw Lake | Passaic | 3.1 mi | 62.27 acres |
| Pinecliff Lake | Passaic | 3.5 mi | 143.82 acres |
| Lake Erskine | Passaic | 3.7 mi | 77.84 acres |
| Upper Erskine Lake | Passaic | 3.8 mi | 32.62 acres |
| Wanaque Reservoir | Passaic | 4.0 mi | 1,971.09 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Monksville Reservoir
How Big Is Monksville Reservoir?
Monksville Reservoir covers 511.92 acres in Passaic County, New Jersey.
What Is the Largest Lake in Passaic County?
Wanaque Reservoir is the largest lake in Passaic County, at 1,971.09 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 167740079). Verified October 30, 2026.