The Westfries Museum is a museum of regional history established in the Dutch city of Hoorn. It was opened on 10 January 1880 and has been established in a monumental building dating to 1632. This building originally belonged to the Gecommitteerde Raden van West-Friesland en het Noorderkwartier, as a part of the Staten van Holland en West-Friesland, and later became a court. Until 1932 part of the building housed the kanton's court and part of its museum. The museum is supported by the Friends Foundation of the Westfries Museum that was set up on the initiative of the Westfries Society.