Lakes / Massachusetts / Middlesex County / Millham Reservoir
Millham Reservoir, Massachusetts
68.45 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Massachusetts
42.34 degrees N, 71.61 degrees W - Middlesex 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 Millham Reservoir Stacks Up
- Larger than 53% of the 784 lakes counted in Massachusetts.
- About 11 miles from Worcester, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bartlett Pond | Worcester | 1.8 mi | 52 acres |
| Williams Lake | Middlesex | 2.1 mi | 73.96 acres |
| Gates Pond | Worcester | 2.4 mi | 89.59 acres |
| Little Chauncy Pond | Worcester | 2.6 mi | 43.24 acres |
| Chauncy Lake | Worcester | 3.4 mi | 173.22 acres |
| Fort Meadow Reservoir | Middlesex | 3.9 mi | 248.34 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Millham Reservoir
How Big Is Millham Reservoir?
Millham Reservoir covers 68.45 acres in Middlesex County, Massachusetts.
What Is the Largest Lake in Middlesex County?
Whitehall Reservoir is the largest lake in Middlesex County, at 620 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 129731596). Verified October 30, 2026.