Tiedeman is a surname. Notable people with the surname include:
George Tiedeman (1861–1935), American politician from Georgia May Seaton-Tiedeman (1862–1948), British suffragist Sean Tiedeman (born 1972), American film director, producer, and actor Tyler Tiedeman (born 1985), American basketball player
See also Tiedeman Island, island in Alaska Tiedemann Giese (1480–1550), Polish bishop and writer