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. It was visited by Lord Baden-Powell in 1926.
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.
Brinnon is located at 47°39′56″N 122°55′30″W / 47.66556°N 122.925°W / 47.66556; -122.925 (47.665652, -122.924952).