How common is synesthesia?
The short answer is that no one really knows. The long answer is anywhere from one in every 100,000 people to one in every 5,000 people, but it’s difficult to get a good count because of the nature of synesthesia. More on this below. The number of cases seems to be increasing, but whether this is due to an actual increase in synesthetes or an increase in self-reports generated by greater public awareness and scientific interest cannot be determined.
