Tardieu may refer to:

• André Tardieu (1876–1945), three times Prime Minister of France (between 1929 and 1932)
• Auguste Ambroise Tardieu (1818–1879), forensic medical scientist of the mid 19th century; President of the French Academy of Medicine, Dean of the Faculty of Medicine and Professor of Legal Medicine at the University of Paris
• Élisabeth-Claire Tardieu (1731-1773), French engraver
• Jacques-Nicolas Tardieu (1716–1791), French engraver
• Jean Tardieu (1903–1995), French artist, musician, poet and dramatic author
• Jean-Charles Tardieu (1765–1830), French painter
• Marie Laure Tardieu (1902–1998), French botanist
• Michel Tardieu (born 1938), French scholar
• Nicolas-Henri Tardieu (1674–1749), French engraver
• Pierre Alexandre Tardieu (1756-1844), French engraver

• Fiscalization of cash registers
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• Fiscal pedalling
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• Fiscal year end
• Fiscella, Andrew
• Fisch
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• Fischbach, Michael
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• Fischel, David