Carlsborg is an unincorporated community and census-designated place (CDP) in Clallam County, Washington, United States.

U.S. Route 101 passes through the southern part of the community, leading east 3 miles (5 km) into Sequim and west 13 miles (21 km) to Port Angeles, the county seat.

According to the United States Census Bureau, the Carlsborg CDP has a total area of 1.0 square mile (2.7 km2), all of it land.

[5] This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F (22.0 °C).

They are known for having three gas stations at the only traffic light on Highway 101 between Port Angeles and Sequim.