Lakes / Connecticut / Middlesex County / Portland Reservoir
Portland Reservoir, Connecticut
31.66 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Connecticut
41.62 degrees N, 72.57 degrees W - Middlesex 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 Portland Reservoir Stacks Up
- Larger than 14% of the 363 lakes counted in Connecticut.
- About 12 miles from Hartford, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Great Hill Pond | Middlesex | 2.8 mi | 74.08 acres |
| Jobs Pond | Middlesex | 3.4 mi | 43.24 acres |
| Pocotopaug Lake | Middlesex | 3.6 mi | 511.28 acres |
| Strong Pond | Hartford | 4.2 mi | 28.66 acres |
| Pecausett Pond | Middlesex | 4.3 mi | 27.84 acres |
| Lake Terramuggus | Hartford | 5.2 mi | 85.39 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Portland Reservoir
How Big Is Portland Reservoir?
Portland Reservoir covers 31.66 acres in Middlesex County, Connecticut.
What Is the Largest Lake in Middlesex County?
Pocotopaug Lake is the largest lake in Middlesex County, at 511.28 acres.
Largest Lakes in Connecticut
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Candlewood | Fairfield | 5,127.26 acres | - |
| 2 | Barkhamsted Reservoir | Litchfield | 2,231.71 acres | - |
| 3 | Lake Lillinonah | Litchfield | 1,531.02 acres | - |
| 4 | Lake Gaillard | New Haven | 1,090.97 acres | - |
| 5 | Bantam Lake | Litchfield | 953.89 acres | - |
All 363 Connecticut lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 123010601). Verified October 30, 2026.