Brinnon is a census-designated place (CDP) in Jefferson County, Washington, United States. The population was 803 at the 2000 census. The community is named for Elwell P. Brinnon, who, in 1860, took a donation land claim at the river's mouth. Brinnon is the home of Camp Parsons, the oldest Boy Scout camp west of the Mississippi River, which was founded in 1919.
Approximately 61 miles (98 km) north of Olympia, Brinnon is located on the Olympic Peninsula's east side, along Hood Canal on the eastern edge of the Olympic National Forest.