Mad as a hatter (disambiguation)

Mad as a hatter is a colloquial English phrase suggesting insanity.

Mad as a hatter may also refer to:


 * "Mad as a Hatter", an episode of Batman: The Animated Series
 * "Mad as a Hatter", an episode of The Real Housewives of Dallas (season 1)
 * "Mad as a Hatter", an episode of Ladies of London
 * Mad As A Hatter (EP), by Def Wish Cast, 1993, and a track on the EP
 * Mad as a Hatter, an album by Shadowland, 1996
 * "Mad as a hatter", part of mnemonic for features of anticholinergic syndrome