| Lake Sacajawea | |
| Pushpin Map: | Washington#USA |
| Basin Countries: | United States |
Lake Sacajawea is a lake formed by the Ice Harbor Dam on the Snake River. It stretches from there upstream to the Lower Monumental Dam. It is named for Sacajawea, a Shoshone woman who accompanied Meriwether Lewis and William Clark during their exploration of the American West.