William Dietz may refer to:
- William C. Dietz (born 1945), science fiction author
- William Dietz (politician) (1778–1848), U.S. Representative from New York
- William Henry Dietz (1884–1964), American football player and coach
Famous quotes containing the word dietz:
“The world is a stage, the stage is a world of entertainment.”
—Howard Dietz (1896–1983)