Lakes / Idaho / Washington County / Mann Creek Reservoir
Mann Creek Reservoir, Idaho
230.3 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
44.40 degrees N, 116.90 degrees W - Washington 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 Mann Creek Reservoir Stacks Up
- Larger than 74% of the 316 lakes counted in Idaho.
- About 64 miles from Boise, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Fairchild Reservoir | Washington | 4.8 mi | 96.62 acres |
| Barton Reservoir | Washington | 5.2 mi | 56.09 acres |
| Little Crane Creek Reservoir | Washington | 12 mi | 35.58 acres |
| Buttermilk Slough | Washington | 14 mi | 59.8 acres |
| Crane Creek Reservoir | Washington | 16 mi | 2,920.79 acres |
| Brownlee Reservoir | Washington | 16 mi | 12,535.1 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mann Creek Reservoir
How Big Is Mann Creek Reservoir?
Mann Creek Reservoir covers 230.3 acres in Washington County, Idaho.
What Is the Largest Lake in Washington County?
Brownlee Reservoir is the largest lake in Washington County, at 12,535.1 acres.
Largest Lakes in Idaho
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pend Oreille | Bonner | 92,764.44 acres | - |
| 2 | American Falls Reservoir | Power | 55,319.78 acres | - |
| 3 | Coeur d'Alene Lake | Kootenai | 26,891.64 acres | - |
| 4 | Lake Cascade | Valley | 25,043.4 acres | - |
| 5 | Priest Lake | Bonner | 23,425.59 acres | - |
All 316 Idaho lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 38105492). Verified October 30, 2026.