Lakes / New Jersey / Union County
Lakes in Union County, New Jersey
1 lakes counted in Union County - the largest is Middlesex Reservoir at 79.6 acres.
1
Lakes Counted
79.6 acres
Largest - Middlesex Reservoir
Union County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Middlesex Reservoir | Union | 79.6 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.