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 theMississippi River. It was visited by Lord Baden-Powell in 1926.