Largest lakes & reservoirs in Washington by acres
This is a comparison for lakes within USA > West > Washington > - Compared by surface area in acres.Note: For some lakes, "Largest Lakes - Acres" data is unknown or does not apply, so this table may display fewer lakes than the total 58 articles we have published for Washington lakes.
Search results: Sort lakes by surface acreage
Lake name  |
Surface area in acres |
Lake description |
|---|---|---|
| Lake Roosevelt (Northeast Washington, USA, Washington, West) |
82,000 ac | Also known as Lake Franklin D. Roosevelt Lake Roosevelt, located approximately 90 miles northwest of Spokane, Washington, covers 82,000 acres with a shoreline of 630 miles. Lake Roosevelt, al… |
| Lake Wallula (Eastern, Oregon, South Central Washington, USA, Washington, West) |
38,800 ac | Lake Wallula, a 64 mile long reservoir, is a wide open glassy lake that extends from northeastern Oregon to southeastern Washington. Lake Wallula rece… |
| Lake Chelan (North Central Washington, USA, Washington, West) |
33,335 ac | From the Salish Indian word for “deep notch”, Lake Chelan is the third deepest lake in the United States with a maximum depth of almost 1500 feet. Lak… |
| Potholes Reservoir (North Central Washington, USA, Washington, West) |
27,800 ac | Potholes Reservoir was formed by the building of the O’Sullivan Dam which is one of the largest earthfill dams in the United States. The name “pothole… |
| Banks Lake (North Central Washington, USA, Washington, West) |
27,000 ac | Banks Lake is a 27 mile equalizing reservoir and part of the Columbia Basin Project, a major water resource project to provide irrigation water to fer… |
| Lake Washington WA (Seattle & Puget Sound, USA, Washington, West) |
21,500 ac | Lake Washington has the distinction of being the second largest natural lake in the state of Washington. This glacial lake is long and narrow, a “ribb… |
| Riffe Lake (Seattle & Puget Sound, USA, Washington, West) |
11,830 ac | Also known as Riffe Reservoir, Mossyrock Lake, Davisson Lake Riffe Lake by any other name would still be a fantastic recreational spot. The name confusion for this man-made reservoir in the Seattle and Puget Sou… |
| Ross Lake (British Columbia, Canada, North Central Washington, USA, Washington, West) |
11,680 ac | Also known as Ross Reservoir Spectacular Ross Lake is one of the seldom seen gems in north-central Washington. This fantastic 22-mile long reservoir covers 11,680 acres along the… |
| Lake Celilo (Mt. Hood-The Gorge, Oregon, Southwest Washington, USA, Washington, West) |
9,400 ac | Also known as Dalles Lock and Dam Beautiful and serene Lake Celilo is located off of I-84 about an hour and a half east of Portland, Oregon. Lake Celilo stretches 24 miles long and str… |
| Lake Sacajawea (South Central Washington, USA, Washington, West) |
9,200 ac | Named after the Shoshone woman, Sacajawea, who was a member of the Lewis and Clark expedition, Lake Sacajawea is located in south-central Washington.… |
| Lake Entiat (North Central Washington, USA, Washington, West) |
9,100 ac | Also known as Rocky Reach Reservoir No trip to the north central part of Washington would be complete without a visit to Lake Entiat and the Rocky Reach Dam. Lake Entiat is a 9,100 acre… |
| Lake Ozette (Olympic Peninsula & Pacific Coast, USA, Washington, West) |
7,550 ac | Also known as Ozette Lake Nestled in dense forest just a few miles from the Pacific Coast, Lake Ozette sits snuggled into Washington’s Olympic Peninsula tourism region, on the… |
