Coast Guard Museum Northwest, Maritime history museum at Coast Guard Station Seattle, United States.

Coast Guard Museum Northwest is a maritime museum located inside an active Coast Guard Station in Seattle, Washington. It holds thousands of objects related to rescue operations, navigation, and Pacific coast maritime service, ranging from ship models and equipment to uniforms and documents.

The museum is dedicated to preserving the heritage of the United States Coast Guard in the Pacific Northwest. It is located on the property of Coast Guard Station Seattle on the Elliott Bay waterfront south of Downtown Seattle. Its holdings include thousands of artifacts and a library of over 3,000 books and periodicals, more than 2,500 historical documents and vessel plans, and over 15,000 photographs.

The museum keeps the largest public collection of Coast Guard patches, and its library holds over 3,000 books and periodicals on Coast Guard and Pacific Northwest maritime history. Among the artifacts are a U.S. Lighthouse Service clock from about 1860 and the ship's bell of the steam tug Roosevelt, Admiral Robert Peary's vessel on his North Pole expeditions.

Entry to the active base requires a valid photo ID, and the museum is only open on select weekdays. It is worth checking current access conditions before planning your visit, as hours can be limited.

The museum holds a Coast Guard flag that flew aboard the first Space Shuttle mission, an unexpected link between ocean rescue and space travel. It also houses one of the largest known collections of Coast Guard service patches, many of which are rarely seen outside specialist circles.