Diebold is a surname, and may refer to:
- Charles Diebold, founder of Diebold Safe & Lock Company, now known as Diebold Inc.
- Clarence Diebold (1881–1964), American college football player at Notre Dame
- John Diebold (1926–2005), American pioneer of computing and automation
- Laure Diebold (1915–1965), member of the French Resistance during WWII
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