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

[3] The community derives its name from Chief James, a Clallam Indian leader.

[5] Jamestown is located in northeastern Clallam County, along the shore of the Strait of Juan de Fuca southeast of Dungeness.

It is 4 miles (6 km) north of the city of Sequim.

According to the United States Census Bureau, the Jamestown CDP has a total area of 0.58 square miles (1.5 km2), all of it land.