Lakes / Louisiana / Vermilion County / Flat Lake
Flat Lake, Vermilion County, Louisiana
436.7 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Louisiana
29.58 degrees N, 92.57 degrees W - Vermilion County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Louisiana Department of Wildlife and Fisheries coordinates, not by eye. Schematic - not a survey map.
How Flat Lake Stacks Up
- Larger than 70% of the 664 lakes counted in Louisiana.
- About 55 miles from Lafayette, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Rollover Lake | Vermilion | 1.7 mi | 259.96 acres |
| East Constance Lake | Vermilion | 2.5 mi | 159.08 acres |
| Blue Lake | Cameron | 7.2 mi | 48.4 acres |
| Grassy Lake | Cameron | 8.0 mi | 101.02 acres |
| Bear Lake | Vermilion | 8.8 mi | 280.14 acres |
| Grande Volle Lake | Vermilion | 9.1 mi | 151.45 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Flat Lake
How Big Is Flat Lake?
Flat Lake covers 436.7 acres in Vermilion County, Louisiana.
What Is the Largest Lake in Vermilion County?
White Lake is the largest lake in Vermilion County, at 55,913.91 acres.
Deepest Natural Lakes in Louisiana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | False River | Pointe Coupee | 3,212 acres | 65 ft |
| 2 | Vernon Lake | Vernon | 6 acres | 53 ft |
| 3 | Lake Concordia | Concordia | 1,026 acres | 50 ft |
| 4 | Caney Creek Reservoir | Jackson | 4,738 acres | 43 ft |
| 5 | Lake Providence | East Carroll | 1,380 acres | 37 ft |
All 27 Louisiana lakes ranked by depth
Largest Lakes in Louisiana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pontchartrain | Jefferson | 407,803.25 acres | - |
| 2 | Toledo Bend Reservoir | Sabine | 181,600 acres | 110 ft |
| 3 | Lake Maurepas | Livingston | 58,308.4 acres | - |
| 4 | Sabine Lake | Cameron | 56,867.74 acres | - |
| 5 | White Lake | Vermilion | 55,913.91 acres | - |
All 664 Louisiana lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID {D76835C4-1469-4068-82AB-E79636418BA8}). Verified October 30, 2026.