The average age at which children stop believing in Santa Claus in the United States is 8.4 years old, according to a survey of over 4,500 Americans
. This age can vary by state, with some children stopping belief as early as 7 years old and others as late as 10 years old. A study from the University of Exeter found that the average age when children stopped believing in Santa Claus was eight
. The belief in Santa typically starts to wane between the ages of 7 and 10, but it ultimately depends on the child
