Thomas Duff

Thomas Duff may refer to:

• Thomas Duff (architect), Irish architect
• Thomas Duff (businessman), American businessman
• Thomas Duff (politician) (1870–1949), Australian politician
• Thomas J. Duff, American architect
• Thomas Neil Duff (1896–1978), politician in Ontario, Canada
• Tom Duff (born 1952), Canadian computer programmer
• Tommy Duff (1905–1951), English footballer