Lakes / New Jersey / Sussex County / Lake Hopatcong
Lake Hopatcong, New Jersey
2,493.66 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - New Jersey
40.95 degrees N, 74.64 degrees W - Sussex 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 Lake Hopatcong Stacks Up
- The largest lake counted in New Jersey by surface area - 2,493.66 acres.
- The largest lake in Sussex County among those counted.
- About 13 miles from Morristown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bear Pond | Sussex | 1.7 mi | 60.79 acres |
| Lake Shawnee | Morris | 3.0 mi | 81.97 acres |
| Lake Lackawanna | Sussex | 3.1 mi | 115.28 acres |
| Wolf Lake | Sussex | 3.3 mi | 52.14 acres |
| Wright Pond | Sussex | 3.8 mi | 31.98 acres |
| Lake Musconetcong | Morris | 4.1 mi | 315.09 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Hopatcong
How Big Is Lake Hopatcong?
Lake Hopatcong covers 2,493.66 acres in Sussex County, New Jersey.
What Is the Largest Lake in Sussex County?
Lake Hopatcong is the largest lake in Sussex County, at 2,493.66 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 167295447). Verified October 30, 2026.