Happy Camp (Karuk: athithúf-vuunupma) is a census-designated place (CDP) in Siskiyou County, California in the United States. The population was 1,190 at the 2010 census.
The town of Happy Camp "The Heart of the Klamath" is located on State Route 96, about 70 miles (110 km) west of Interstate 5 and 100 miles (160 km) northeast of Willow Creek. The town of O'Brien, Oregon is accessible from Happy Camp (which is nearly 40 miles (64 km) away). The shortest route to Oregon, over the Grey Back pass, is a seasonal summer road and is not cleared or maintained in snowy conditions. The Forest Service, located in Happy Camp on SR 96, provides road closure information.