Order 66 may refer to:
*
Order 66 (''Star Wars''), a fictional prearranged military command given by Darth Sidious during the movie ''Star Wars Episode III: Revenge of the Sith''
* ''
Star Wars Republic Commando: Order 66'', the fourth novel in the Republic Commando series, written by Karen Traviss
*
Order 66/2523 The Order of the Office of the Prime Minister No. 66/2523, often known simply as Order 66/2523 or Order 66/23, was a directive of the Thai government outlining key policies in the fight against the communist insurgency towards the end of the Cold ...
, a 1980 anti-communist directive of the Thai government
*
Standing Order 66, a 1713 British Parliamentary procedure
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