Lakes / Alaska / Matanuska-Susitna County / Index Lake
Index Lake, Alaska
39 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Alaska
61.81 degrees N, 147.96 degrees W - Matanuska-Susitna 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 Index Lake Stacks Up
- Larger than 8% of the 2,450 lakes counted in Alaska.
- About 76 miles from Anchorage, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bench Lake | Matanuska-Susitna | 2.2 mi | 42 acres |
| Tatondan Lake | Matanuska-Susitna | 2.2 mi | 56 acres |
| Hundred Mile Lake | Matanuska-Susitna | 3.6 mi | 27 acres |
| Long Lake | Matanuska-Susitna | 8.5 mi | 105 acres |
| Hicks Lake | Matanuska-Susitna | 8.9 mi | 39 acres |
| Upper Bonnie Lake | Matanuska-Susitna | 9.8 mi | 95 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Index Lake
How Big Is Index Lake?
Index Lake covers 39 acres in Matanuska-Susitna County, Alaska.
What Is the Largest Lake in Matanuska-Susitna County?
Lake Louise is the largest lake in Matanuska-Susitna County, at 14,705 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 26582955). Verified October 30, 2026.