Lakes / Washington / Clark County
Lakes in Clark County, Washington
15 lakes counted in Clark County - the largest is Lake Merwin at 3,837 acres.
15
Lakes Counted
3,837 acres
Largest - Lake Merwin
Clark County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Merwin | Clark | 3,837 acres | - |
| 2 | Vancouver Lake | Clark | 2,287 acres | - |
| 3 | Lacamas Lake | Clark | 260 acres | About 65 ft |
| 4 | Campbell Lake | Clark | 239 acres | - |
| 5 | Lancaster Lake | Clark | 209 acres | - |
| 6 | Green Lake | Clark | 135 acres | - |
| 7 | Canvasback Lake | Clark | 126 acres | - |
| 8 | Horseshoe Lake | Clark | 83 acres | About 14 ft |
| 9 | Post Office Lake | Clark | 75 acres | - |
| 10 | Lake Rosannah | Clark | 70 acres | - |
| 11 | Lancaster Lake | Clark | 54 acres | - |
| 12 | Carty Lake | Clark | 41 acres | - |
| 13 | Widgeon Lake | Clark | 38 acres | - |
| 14 | Round Lake | Clark | 29 acres | About 60 ft |
| 15 | Battle Ground Lake | Clark | 25 acres | About 60 ft |
Sources: Washington DFW lake data; USGS. Verified October 30, 2026.