What is the name of the Hogwarts headmaster in the first book?

The Hogwarts headmaster in the first book is Albus Dumbledore. He leads Hogwarts when Harry arrives for his first year in Harry Potter and the Philosopher’s Stone, published in 1997.

Dumbledore is one of the wizarding world’s most respected figures. Before becoming headmaster, he taught Transfiguration at Hogwarts and became famous for defeating the dark wizard Gellert Grindelwald in 1945. He is also associated with the discovery of twelve uses for dragon’s blood and with alchemical research alongside Nicolas Flamel.

In the first book, Dumbledore quietly protects the Philosopher’s Stone after it is moved from Gringotts to Hogwarts. He places several magical obstacles around it, including protections created by different professors. His leadership combines wisdom with secrecy, a pattern that becomes increasingly important as Harry learns about Voldemort.

Minerva McGonagall is the Transfiguration professor and later serves as headmistress, while Severus Snape teaches Potions. Horace Slughorn becomes important later, especially in Half-Blood Prince, but none of them is the first book’s headmaster.