Lakes / Alaska / Ketchikan Gateway County / Upper Silvis Lake
Upper Silvis Lake, Alaska
244 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Alaska
55.38 degrees N, 131.53 degrees W - Ketchikan Gateway 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 Upper Silvis Lake Stacks Up
- Larger than 63% of the 2,450 lakes counted in Alaska.
- About 230 miles from Juneau, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lower Silvis Lake | Ketchikan Gateway | 0.9 mi | 76 acres |
| Upper Mahoney Lake | Ketchikan Gateway | 2.5 mi | 82 acres |
| Whitman Lake | Ketchikan Gateway | 3.0 mi | 166 acres |
| Mahoney Lake | Ketchikan Gateway | 3.0 mi | 173 acres |
| Upper Ketchikan Lake | Ketchikan Gateway | 3.7 mi | 326 acres |
| Lower Ketchikan Lake | Ketchikan Gateway | 3.8 mi | 348 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Upper Silvis Lake
How Big Is Upper Silvis Lake?
Upper Silvis Lake covers 244 acres in Ketchikan Gateway County, Alaska.
What Is the Largest Lake in Ketchikan Gateway County?
Ella Lake is the largest lake in Ketchikan Gateway County, at 1,866 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 120548401). Verified October 30, 2026.