Sacajawea State Park, State park in Franklin County, United States.

Sacajawea State Park covers 267 acres (108 ha) in Pasco, Washington, at the mouth of the Snake River where it joins the Columbia. The park holds the expedition campsite, a museum and three other buildings raised by WPA workers in 1938, and the Sacajawea Interpretive Center with exhibits on Sacagawea and the Lewis and Clark Expedition.

The park began as a single acre donated in 1927 by the Pasco chapter of the Daughters of the Pioneers of Washington, who maintained the Lewis and Clark campsite. The grounds became a state park in 1931, and Works Progress Administration crews built the museum and three other buildings in 1938.

The Interpretive Center displays exhibits about the expedition, Native American tribes, and artifacts linked to the Wanapum and Umatilla peoples. The exhibits help visitors understand how this place connects to the people who have lived in the region for generations.

The park sits at the mouth of the Snake River where it joins the Columbia, with facilities for picnicking, hiking, boating, fishing and swimming. It is the starting point of the paved Sacagawea Heritage Trail linking the Tri-Cities communities. The single campsite is reserved for paddlers on the Northwest Discovery Water Trail.

The park began in 1927 as a single acre donated by the Pasco chapter of the Daughters of the Pioneers of Washington to protect the Lewis and Clark campsite; the grounds became a state park in 1931. Its one campsite is kept in reserve for paddlers on the Northwest Discovery Water Trail.