Crackpot

Crackpot may refer to:
 * A pejorative for an extremist who espouses pseudoscience and is resistant to reason; there are humorous frameworks for measuring degree of pseudo-scientific thinking, such as the crackpot index.
 * Crackpot, North Yorkshire, a village in the United Kingdom and home of Crackpot Cave
 * Crackpot Hall, a landmark ruin near Keld, North Yorkshire
 * a DC comics character, see Blasters (comics)
 * "Crackpot", a 1991 episode of the PBS show Shining Time Station