Alder is a census-designated place (CDP) in Pierce County, Washington, United States.

The community is located along the shore of Alder Lake on State Route Highway 7 near the entrance to Mount Rainier National Park.

A post office called Alder was established in 1902, and remained in operation until 1975.

[3] The community was named for the alder trees near the original town site.

This Pierce County, Washington state location article is a stub.