Friday Harbor Laboratories (FHL), is a marine biology field station of the University of Washington, located in Friday Harbor, San Juan Island, Washington, United States.

Autumn and spring academic terms include courses designed for advanced undergraduates as well as graduate students; most spring and fall classes run 10 weeks and feature an original research component.

[1] FHL was founded in 1904 by University of Washington Zoology Professor Trevor Kincaid, who became its first director.

[2] In 2004, zoologist Patricia Louise Dudley, who had spent many summers at the Laboratory, created an endowment to support "research or scholarships for the study of systematics, the structure of marine organisms, or for marine invertebrate ecology".

[3] She directed that fund recipients spend significant time at Friday Harbor, and added her desire that "findings contribute to the understanding of evolutionary relationships".