The Captain George Anderson House, also called the Octagonal House, is an octagon house now located in Sackville, New Brunswick. It was built in 1855 by Captain George Anderson, a mariner and shipbuilder. It was later deeded to his father, Captain Titus Anderson and stayed in the Anderson family until 1901. It was used for many years by a foundry company as a storage facility, but was kept in good repair. It is a national historic site of Canada. In 1999 Sackville designated it a local heritage site.