Dallesport is an unincorporated community and census-designated place (CDP) in Klickitat County, Washington, United States.

The location was traditionally a site of the Wishram tribe (called "Echeloots" by Lewis and Clark), who lived on the north bank of the Columbia River about 10 miles (16 km) in both directions from The Dalles, Oregon.

Indian burials from Memaloose Island in the Columbia were removed to the Wish-ham Cemetery near Dallesport prior to the filling of Lake Celilo.

The loss of their traditional fishing grounds at Celilo Falls during the construction of The Dalles Dam in March 1957 dealt both a spiritual and an economic blow to the tribe.

[3] Originally called "Rockport" or "Rockland Flats", Dallesport was the site of the first ferry crossing in the area, beginning in 1854.

The Oregon Portage Railroad allowed passage of goods and travelers by rail beginning in 1863, but shippers chafed at the monopoly.

Washington State Route 14 forms the northern edge of the Dallesport CDP and leads east (upriver) 17 miles (27 km) to Maryhill and west (downriver) the same distance to White Salmon.

This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F.

[6] On June 28, 2021, Dallesport's high temperature of 118 °F (48 °C) tied the all-time Washington State heat record.