Lakes / Alaska / Lake and Peninsula County / Iliamna Lake
Iliamna Lake, Alaska
654,518 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Alaska
59.55 degrees N, 155.09 degrees W - Lake and Peninsula 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 Iliamna Lake Stacks Up
- The largest lake counted in Alaska by surface area - 654,518 acres.
- The largest lake in Lake and Peninsula County among those counted.
- About 124 miles from Homer, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Pike Lake | Lake and Peninsula | 15 mi | 145 acres |
| Schoolhouse Lake | Lake and Peninsula | 15 mi | 99 acres |
| Beaver Lake | Lake and Peninsula | 18 mi | 27 acres |
| Old Roadhouse Lake | Lake and Peninsula | 19 mi | 52 acres |
| Gibraltar Lake | Lake and Peninsula | 19 mi | 3,145 acres |
| Pike Lakes | Lake and Peninsula | 19 mi | 72 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Iliamna Lake
How Big Is Iliamna Lake?
Iliamna Lake covers 654,518 acres in Lake and Peninsula County, Alaska.
What Is the Largest Lake in Lake and Peninsula County?
Iliamna Lake is the largest lake in Lake and Peninsula County, at 654,518 acres.
Largest Lakes in Alaska
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Iliamna Lake | Lake and Peninsula | 654,518 acres | - |
| 2 | Becharof Lake | Lake and Peninsula | 289,706 acres | - |
| 3 | Teshekpuk Lake | North Slope | 206,614 acres | - |
| 4 | Naknek Lake | Lake and Peninsula | 145,357 acres | - |
| 5 | Dall Lake | Bethel | 111,681 acres | - |
All 2,450 Alaska lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 120013360). Verified October 30, 2026.