Lakes / Louisiana / St. Bernard County / Portman Lagoon
Portman Lagoon, Louisiana
190.63 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Louisiana
29.83 degrees N, 89.64 degrees W - St. Bernard 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 Portman Lagoon Stacks Up
- Larger than 53% of the 664 lakes counted in Louisiana.
- About 27 miles from New Orleans, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Hopedale Lagoon | St. Bernard | 1.7 mi | 471.48 acres |
| Lena Lagoon | St. Bernard | 2.5 mi | 625.18 acres |
| Lake Ameda | St. Bernard | 2.6 mi | 689.61 acres |
| Oyster Bay | St. Bernard | 2.6 mi | 64.87 acres |
| Bayou Catilano | St. Bernard | 2.6 mi | 155.4 acres |
| Bernard Lagoon | St. Bernard | 2.7 mi | 92.64 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Portman Lagoon
How Big Is Portman Lagoon?
Portman Lagoon covers 190.63 acres in St. Bernard County, Louisiana.
What Is the Largest Lake in St. Bernard County?
Lake Lery is the largest lake in St. Bernard County, at 5,280.31 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 {F1B01294-8906-4CD5-9DF9-2A11C8837822}). Verified October 30, 2026.