Lakes / Oregon / Malheur County / Chapman Reservoir
Chapman Reservoir, Oregon
41 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
43.47 degrees N, 118.04 degrees W - Malheur 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 Chapman Reservoir Stacks Up
- Larger than 26% of the 642 lakes counted in Oregon.
- About 169 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Walls Reservoir | Malheur | 1.0 mi | 45 acres |
| Easterday Reservoir | Malheur | 4.9 mi | 385 acres |
| Shumway Reservoir | Malheur | 7.5 mi | 29 acres |
| Crowley Reservoir | Malheur | 12 mi | 49 acres |
| Warm Springs Reservoir | Harney | 14 mi | 4,139 acres |
| Butte Reservoir | Malheur | 15 mi | 145 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Chapman Reservoir
How Big Is Chapman Reservoir?
Chapman Reservoir covers 41 acres in Malheur County, Oregon.
What Is the Largest Lake in Malheur County?
Lake Owyhee is the largest lake in Malheur County, at 11,120 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 145653515). Verified October 30, 2026.