Carlsborg is a census-designated place (CDP) in Clallam County, Washington, United States. The population was 855 at the 2000 census.
Carlsborg was founded in 1915 by C.J. Erickson, and named after his hometown in Sweden. Its sawmill discontinued operations in 1968.
Carlsborg is located at 48°5′3″N 123°10′13″W / 48.08417°N 123.17028°W / 48.08417; -123.17028 (48.084085, -123.170290).