What is the fear of crowds called?

Demophobia is the fear of crowds of people or mobs. People with this fear avoid places that are known to be crowded places or heavily populated. The origin of the word demo is Greek (meaning people) and phobia is Greek (meaning fear).

Demophobia is considered to be a social phobia. Demophobia is also called Enochlophobia or Ochlophobia or Ochilophobia and related to Agoraphobia.

It is generally accepted that phobias arise from a combination of external events (i.e. traumatic events) and internal predispositions (i.e. heredity or genetics). Many specific phobias can be traced back to a specific triggering event, usually a traumatic experience at an early age. Social phobias and agoraphobia have more complex causes that are not entirely known at this time. It is believed that heredity, genetics, and brain chemistry combine with life-experiences to play a major role in the development of phobias.