Lakes / Massachusetts / Norfolk County / Neponset Reservoir
Neponset Reservoir, Massachusetts
323.22 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Massachusetts
42.08 degrees N, 71.24 degrees W - Norfolk County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Massachusetts Division of Fisheries and Wildlife coordinates, not by eye. Schematic - not a survey map.
How Neponset Reservoir Stacks Up
- Larger than 94% of the 784 lakes counted in Massachusetts.
- About 21 miles from Cambridge, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lakeview Pond | Norfolk | 1.7 mi | 28.1 acres |
| Cocasset Lake | Norfolk | 1.9 mi | 34.43 acres |
| Massapoag Lake | Norfolk | 3.6 mi | 388.97 acres |
| Mirror Lake | Norfolk | 4.2 mi | 61.53 acres |
| Kingfisher Pond | Norfolk | 4.3 mi | 31.63 acres |
| Lake Mirimichi | Norfolk | 4.7 mi | 177.35 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Neponset Reservoir
How Big Is Neponset Reservoir?
Neponset Reservoir covers 323.22 acres in Norfolk County, Massachusetts.
What Is the Largest Lake in Norfolk County?
Massapoag Lake is the largest lake in Norfolk County, at 388.97 acres.
Deepest Natural Lakes in Massachusetts
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Walden Pond | Middlesex | 62 acres | 100 ft |
| 2 | Cliff Pond | Barnstable | 206 acres | 96 ft |
| 3 | Wallum Lake | Worcester | 322 acres | 81 ft |
| 4 | Onota Lake | Berkshire | 653 acres | 72 ft |
| 5 | Ashumet Pond | Barnstable | 220 acres | 69 ft |
All 211 Massachusetts lakes ranked by depth
Largest Lakes in Massachusetts
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Quabbin Reservoir | Franklin | 24,012 acres | - |
| 2 | Wachusett Reservoir | Worcester | 4,041 acres | - |
| 3 | Assawompset Pond | Plymouth | 2,652.37 acres | - |
| 4 | Watuppa Pond | Bristol | 1,758.37 acres | - |
| 5 | South Watuppa Pond | Bristol | 1,460 acres | 23 ft |
All 784 Massachusetts lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 135697529). Verified October 30, 2026.