Lakes / Texas / Llano County / Lake Buchanan
Lake Buchanan, Texas
22,211 acres
Surface Area
132 ft
Max Depth
Where It Sits, and How Deep It Goes
Locator - Texas
30.82 degrees N, 98.42 degrees W - Llano 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.
Depth Profile - Lake Buchanan
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Lake Buchanan Stacks Up
- Larger than 99% of the 1,641 lakes counted in Texas.
- The largest lake in Llano County among those counted.
- About 56 miles from Austin, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake LBJ | Burnet | 16 mi | 5,940.91 acres |
| Llano River Lake | Llano | 16 mi | 77.59 acres |
| Llano Park Lake | Llano | 18 mi | 76.6 acres |
| Soil Conservation Service Site 3 Reservoir | Lampasas | 19 mi | 26.44 acres |
| Soil Conservation Service Site 2 Reservoir | Lampasas | 19 mi | 44.48 acres |
| Lake Marble Falls | Burnet | 19 mi | 611 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Buchanan
How Big Is Lake Buchanan?
Lake Buchanan covers 22,211 acres in Llano County, Texas.
How Deep Is Lake Buchanan?
Lake Buchanan reaches 132 ft at its deepest.
What Is the Largest Lake in Llano County?
Lake Buchanan is the largest lake in Llano County, at 22,211 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: Texas Parks & Wildlife lake data (ID 69727703). Verified October 30, 2026.