Lakes / Texas / Matagorda County / Mad Island Lake
Mad Island Lake, Texas
862.4 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Texas
28.64 degrees N, 96.12 degrees W - Matagorda County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Texas Parks and Wildlife Department coordinates, not by eye. Schematic - not a survey map.
How Mad Island Lake Stacks Up
- Larger than 89% of the 1,641 lakes counted in Texas.
- About 90 miles from Houston, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Freshwater Lake | Matagorda | 3.8 mi | 28.42 acres |
| Crab Lake | Matagorda | 4.7 mi | 204.6 acres |
| Robbins Lake | Matagorda | 6.8 mi | 48.93 acres |
| Cooling Water Reservoir | Matagorda | 9.9 mi | 6,958.49 acres |
| Kelly Lake | Matagorda | 12 mi | 33.36 acres |
| Donaldson Lake | Matagorda | 12 mi | 40.53 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mad Island Lake
How Big Is Mad Island Lake?
Mad Island Lake covers 862.4 acres in Matagorda County, Texas.
What Is the Largest Lake in Matagorda County?
Cooling Water Reservoir is the largest lake in Matagorda County, at 6,958.49 acres.
Deepest Natural Lakes in Texas
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Amistad Reservoir | Val Verde | 64,900 acres | 217 ft |
| 2 | Comanche Creek Reservoir | Pecos | 3,272 acres | 125 ft |
| 3 | Belton Lake | Bell | 12,385 acres | 124 ft |
| 4 | O. H. Ivie Reservoir | Concho | 19,149 acres | 119 ft |
| 5 | Stillhouse Hollow Lake | Bell | 6,429 acres | 107 ft |
All 107 Texas lakes ranked by depth
Largest Lakes in Texas
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Toledo Bend Reservoir | Sabine | 181,600 acres | 110 ft |
| 2 | Sam Rayburn Reservoir | San Augustine | 114,500 acres | 80 ft |
| 3 | Lake Livingston | San Jacinto | 90,000 acres | 77 ft |
| 4 | Falcon Reservoir | Zapata | 80,555.4 acres | - |
| 5 | Amistad Reservoir | Val Verde | 64,900 acres | 217 ft |
All 1,641 Texas lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 128430065). Verified October 30, 2026.