Sleep of Reason

(The) Sleep of Reason may refer to:


 * Sleep of Reason (album), a 2013 album by Raffertie
 * Sleep of Reason, a 2005 album by The Eternal
 * The Sleep of Reason (Day novel), a novel by Martin Day based on the television series Doctor Who
 * The Sleep of Reason (Snow novel), the tenth book in C. P. Snow's Strangers and Brothers series
 * The Sleep of Reason, a 2014 horror anthology edited by Spike Trotman