What is the average age of a Harry Potter fan?

Most people begin reading it no earlier than around ten or eleven years old, but the range of fans goes from there to people in their sixties.

The first book came out in 1997 and is aimed at eleven year olds. Most of the fans who grow up with the series, that is to say they read them as they were released, are in their late teens and early twenties.

However, there is now a new generation of children who will read the books but as they have all been released they don't need to wait so they may finish it younger.

There are also children who will watch the films but never read the books.

So it is very hard to determine the average age.