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Lake Sacajawea
Overview of the lake in 2017
Lake Sacajawea Show map of Washington (state) Lake Sacajawea Show map of the United States
Location	Franklin / Walla Walla counties, Washington, United States
Coordinates	46°14′58″N 118°52′47″W / 46.24944°N 118.87972°W / 46.24944; -118.87972
Type	reservoir
Primary inflows	Snake River
Primary outflows	Snake River
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.

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