In How to Train Your Dragon: The Hidden World, Hiccup holds the position of Chief of Berk.
Hiccup becomes chief after the death of his father, Stoick the Vast, near the end of How to Train Your Dragon 2. The third film shows him trying to lead Berk while also protecting the dragons who live alongside the Vikings.
His leadership is tested by overcrowding, dragon hunters, and the arrival of the Light Fury. Hiccup initially believes that Berk must remain the dragons’ permanent home, but he eventually accepts that true protection may require letting them leave for the Hidden World.
The title “Chief of Berk” is distinct from informal labels such as Dragon Master. Hiccup is an inventor, dragon rider, and leader, but the formal political role he inherits is chief. Stoick previously held that same office.