Playfair
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Playfair may refer to:
- Lyon Playfair, 1st Baron Playfair (1818–1898)
- Playfair cipher - a manual symmetric encryption technique named after the above
- William Playfair (1759–1823), Scottish engineer and political economist, inventor of statistical graphics
- John Playfair (1748–1819), Scottish scientist, brother of the above
- James Playfair (–1794), Scottish architect, brother of the above
- William Henry Playfair (1790–1857), Scottish architect (National Gallery of Scotland, Royal Scottish Academy)
- Ian Stanley Ord Playfair (1894-1972), a general in the British Army
There is more than one crater named Playfair: