Headmaster

A Headmaster or Headmistress is the chief administrator of a school of magic. They make all major decisions regarding the safety and the day-to-day functioning of the school and have the power to override any decision made by any other authoritative facilitator at teh school, with the possible exception fo the Board of Governors, in Hogwarts. A Headmaster also controls the protective spells surrounding the school and the ability for certain individuals to enter or exit the grounds at will. The four founders of Hogwarts are not considered heads, despite leading the school during their time.

Hogwarts also has a Deputy Headmaster or Deputy Headmistress that assists the headmaster in their duties. In the event of a headmaster's incapacitation, the deputy headmaster serves as temporary headmaster until the Board of Governors can elect a new, permanent one. There can also be more than one deputy headmaster, as the Carrow siblings served under Severus Snape when Voldemort took over Hogwarts.

Headmasters

 * Brian Gagwilde
 * Heliotrope Wilkins
 * Phyllida Spore
 * Edessa Skandenberg
 * Fytherley Undercliffe
 * Antonia Creaseworthy
 * Elizabeth Burke
 * Vulpus
 * Everard
 * Vindictus Viridian
 * Amrose Swott
 * Dilys Derwent
 * Eupraxia Mole
 * Quentin Trimble
 * Limebert
 * Dexter Fortescue
 * Basil Fronsac
 * Walter Aragon
 * Mordicus Egg
 * Brutus Scrimgeour
 * Phineas Nigellus Black
 * Armando Dippet
 * Albus Dumbledore
 * Minerva McGonagall
 * Dolores Umbridge
 * Severus Snape

Deputy Headmasters

 * Minerva McGonagall
 * Alecto Carrow
 * Amycus Carrow

Durmstrang Institute

 * Nerida Vulchanova
 * Harfang Munter
 * Igor Karkaroff

Beauxbatons Academy of Magic

 * Olympe Maxime

Castelobruxo

 * Benedita Dourado

Ilvermorny School of Witchcraft and Wizardry

 * Isolt Sayre
 * James Steward
 * Agilbert Fontaine