Fauchea laciniata can be found all along the west coast of North America, ranging from Prince William Sound, Alaska to Baja California, Mexico. It generally lives in areas with a rocky substrate in the low intertidal to subtidal regions (Mondragon et al. 2003). Locally, in the Puget Sound and San Juan Island area F. laciniata has a wide distribution. Specimens in the FHL Herbarium are from the following areas:
- Port Townsend, WA
- Canoe Island
- Smith Island, Strait of Juan de Fuca
- Cattle Point, San Juan Island
- Straits of Juan de Fuca
- Friday Harbor, San Juan Island
Mondragon, J. and J. Mondragon. Seaweeds of the Pacific Coast: Common Marine Algae from Alaska to Baja California. Monterey, California: Sea Challengers Publication, 2003.