The Octagon House was first established as a museum by the St. Croix County Historical Society in 1964, and curated as a domestic home from the mid-late nineteenth century. The house was added to the National Register of Historic Places in 1974. The St. Croix County Historical Society, a private non-profit organization, operated the Octagon House Museum (also called the John S. Moffat House) as a traditional historic house museum. In 2023,  the museum board separated from the St Croix County Historical Society and reinvented itself as a the Hudson Area History Connection (HAHC).

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Today, the Octagon House Museum is operated by the Hudson Area History Connection and offers private and group tours, field trips, rotating exhibits, events, and family fun, as well as opportunities to research, present, and share Hudson history through volunteering and board membership. 

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Open seasonally for drop-in tours and year-round by appointment!