Lakes / Oregon / Lake County / Flagstaff Lake
Flagstaff Lake, Oregon
3,633 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
42.58 degrees N, 119.80 degrees W - Lake 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 Flagstaff Lake Stacks Up
- Larger than 95% of the 642 lakes counted in Oregon.
- About 127 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Mugwump Lake | Lake | 2.3 mi | 200 acres |
| Upper Campbell Lake | Lake | 2.7 mi | 979 acres |
| Campbell Lake | Lake | 4.1 mi | 2,290 acres |
| Swamp Lake | Lake | 4.2 mi | 921 acres |
| Anderson Lake | Lake | 5.7 mi | 432 acres |
| Turpin Lake | Lake | 6.0 mi | 210 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Flagstaff Lake
How Big Is Flagstaff Lake?
Flagstaff Lake covers 3,633 acres in Lake County, Oregon.
What Is the Largest Lake in Lake County?
Lake Abert is the largest lake in Lake County, at 37,137 acres.
Largest Lakes in Oregon
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Upper Klamath Lake | Klamath | 62,095 acres | - |
| 2 | Lake Umatilla | Morrow | 50,042 acres | - |
| 3 | Lake Abert | Lake | 37,137 acres | - |
| 4 | Summer Lake | Lake | 31,602 acres | - |
| 5 | Harney Lake | Harney | 31,290 acres | - |
All 642 Oregon 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 83448599). Verified October 30, 2026.