Sericocarpus rigidus is a species of flowering plant in the aster family known by the common name Columbian whitetop aster. It is native to the Pacific Northwest of North America, where it is known from southern Vancouver Island in British Columbia south along the coast to Washington and Oregon. The invasion of the habitat by introduced species is a threat to this plant. Other threats include loss of habitat to development, off-road vehicles, military activity, and fire suppression.