Can a 10 year boy start puberty?

Yes, it is possible for a 10 year old boy to start puberty. Although the average age for boys to start puberty is 11-14 years old, some boys may start as early as 9 or 10 years old. This is known as precocious puberty and is considered to be normal in some cases. If you are concerned about your son's development, it is best to talk to a doctor.