Thomas William Fuller (May 3, 1865 – November 4, 1951), the son of Thomas Fuller, was a Canadian architect. Before his selection as Dominion Architect, Fuller designed a number of federal buildings in Dawson City, Yukon, some of which are now designated as National Historic Sites of Canada. These include the Post Office (1899); Court House (1900–01); Territorial Administration Building, 5th Avenue (1901); Public School (1901) which burned 1957; and Commissioner's Residence (1901).