Lake Samish is a lake south of Bellingham, Washington.

Visible to the West of Interstate 5 when travelling between Alger and Bellingham, Lake Samish is heavily used for recreation in the summer months by local residents. The lake shoreline is heavily developed and homesites cover almost the entire shoreline. Lake Samish is bordered on the south by Blanchard Mountain and on the north by Chuckanut Pass. Public access is limited but a Whatcom County park with a rough boat launch is located along the northern shore.

In pre-Colonial days, members of the Samish tribe lived at sites on the lake. It is often confused with Sammamish.