The Father William Duncan House, also known as the Father Duncan Cottage and now hosting the Duncan Cottage Museum, is a historic house located at 501 Tait Street in Metlakatla, Alaska. The single-story wood frame structure was built in 1891 by the Tsimshian followers of the Anglican missionary William Duncan. It was one of the first structures built in Metlakatla after Duncan led a small number of followers there from the like-named village in British Columbia. The front facade is faced in shiplap siding, with four evenly spaced pilasters. There is decorative woodwork in the shallow-pitch gable end. Duncan was an influential leader of the community until his death in 1918.