The Madness of Crowds may refer to:
Extraordinary Popular Delusions and the Madness of Crowds, an 1841 book by Charles Mackay The Madness of Crowds (Troy Donockley album), 2009 The Madness of Crowds (Ingrid Laubrock album), 2011 The Madness of Crowds: Gender, Race and Identity, a 2019 book by Douglas Murray
See also The Wisdom of Crowds