Lakes / South Dakota / Marshall County / Lake Martha
Lake Martha, South Dakota
96.12 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.61 degrees N, 97.23 degrees W - Marshall 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 Martha Stacks Up
- Larger than 40% of the 533 lakes counted in South Dakota.
- About 50 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Whitestone Lake | Roberts | 2.3 mi | 214.49 acres |
| Buffalo Lakes | Marshall | 2.5 mi | 1,986.48 acres |
| Almos Lake | Marshall | 3.8 mi | 231.04 acres |
| Drywood Lakes | Roberts | 3.8 mi | 1,026.97 acres |
| Lake Whipple | Roberts | 4.2 mi | 85.75 acres |
| Josephine Lake | Marshall | 4.6 mi | 101.07 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Martha
How Big Is Lake Martha?
Lake Martha covers 96.12 acres in Marshall County, South Dakota.
What Is the Largest Lake in Marshall County?
Buffalo Lakes is the largest lake in Marshall County, at 1,986.48 acres.
Largest Lakes in South Dakota
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Oahe | Dewey | 309,912.57 acres | - |
| 2 | Lake Francis Case | Charles Mix | 82,166.92 acres | - |
| 3 | Lake Sharpe | Hughes | 58,419.67 acres | - |
| 4 | Lewis and Clark Lake | Bon Homme | 25,141.99 acres | - |
| 5 | Lake Thompson | Kingsbury | 13,887.93 acres | - |
All 533 South Dakota lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 145087922). Verified October 30, 2026.