In the first book of the Harry Potter series, titled ‘Harry Potter and the Sorcerer’s Stone’ (or ‘Harry Potter and the Philosopher’s Stone’ in some regions), Harry Potter is introduced as an eleven-year-old boy. His birthday is on July 31, 1980, and the story begins in 1991 when he receives his acceptance letter to Hogwarts School of Witchcraft and Wizardry.
This age is significant as it marks the beginning of Harry’s journey into the wizarding world, setting the stage for his development and adventures throughout the series.