Password

"No Password, no entry!"

- The Fat Lady in 1995

Passwords are used throughout Hogwarts Castle to restrict entry to certain areas such as house common rooms and teacher offices. Passwords in Hogwarts appear to change on a frequent basis.

During Sir Cadogan's period of guarding the Gryffindor common room, he changed passwords so frequently that Neville Longbottom had to write them down. This list was snatched by Crookshanks and was given to Sirius Black, allowing him entrance.

Passwords were also used as a way to gain to access to the radio programme Potterwatch, as a way to protect it from Death Eaters possibly listening. New passwords were introduced at the end of each broadcast, and could be used to listen to the next one.

1991

 * Caput Draconis (Latin for "Dragon's Head")
 * Pig Snout

1992

 * Wattlebird

1993

 * Fortuna Major (Latin for "greater luck")
 * Flibbertigibbet
 * Oddsbodikins
 * Scurvy Cur

1994

 * Balderdash
 * Banana Fritters
 * Fairy Lights

1995

 * Mimbulus mimbletonia
 * Alea iacta est (Latin for "The die is cast.")

1996

 * Abstinence
 * Baubles
 * Dilligrout
 * Tapeworm
 * Quid Agis (Latin for "How are you")

Hufflepuff Basement

 * Instead of a password, one must tap the correct barrel with their wand, in the rhythm of "Helga Hufflepuff".

Ravenclaw Tower
(Instead of a password, a conundrum is posed.)
 * Which came first, the phoenix or the flame?
 * Answer: A circle has no beginning.
 * Where do Vanished objects go?
 * Answer: Into nonbeing, which is to say, everything.

1992

 * Pure-blood

1992

 * Sherbet lemon

1994

 * Cockroach cluster

1996

 * Acid Pops
 * Fizzing Whizbees
 * Toffee Eclairs

1997

 * Dumbledore

Unknown

 * Chocolate Frogs

1994

 * Pine-fresh

One-Eyed Witch Passage

 * Dissendium

Chamber of Secrets and Salazar Slytherin's Locket

 * "Open" (spoken in Parseltongue)
 * Speak to me, Slytherin, greatest of the Hogwarts four. (spoken in Parseltongue, to release Salazar Slytherin's basilisk from its nesting place)

Elizabeth Burke's portrait

 * Slytherins are Supreme
 * Facta, non verba (Latin for Deeds, not words)

Glanmore Peakes's portraits

 * Sea Serpent

Percival Pratt's portrait

 * This Password is Absurd

Basil Fronsac's portrait

 * Studious Success
 * Libraries Liberate

Giffard Abbott's portrait

 * Dragon's Egg
 * Light against Darkness

Damara Dodderidge's portrait

 * Chops and Gravy
 * Dashing Cadogan

Boris the Bewildered's portrait

 * Forget-Me-Never

Old Posh Baron's portrait

 * Fizzy Pop

Hesper Starky's portrait

 * Lunartickle

(Grounds portrait)

 * Catweazle

(Dungeons portrait)

 * Wanglewort

(Upper Castle portrait)

 * Wolf's Bane

Marauder's Map
"I solemnly swear I am up to no good" to reveal the map, and "Mischief Managed" to hide it.

Potterwatch

 * Albus
 * Dearborn
 * Fawkes
 * Longbottom
 * Mad-Eye
 * Meadowes
 * Moody
 * Padfoot
 * Phoenix
 * Prewett
 * Sirius
 * Vance
 * Wulfric (One of Albus Dumbledore's middle names)

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Chamber of Secrets (film)
 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Goblet of Fire (film)
 * Harry Potter and the Goblet of Fire (video game)
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (film)
 * Harry Potter and the Order of the Phoenix (video game)
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter and the Half-Blood Prince (video game)
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 1
 * Harry Potter and the Deathly Hallows: Part 1 (video game)
 * Harry Potter and the Deathly Hallows: Part 2
 * Harry Potter and the Deathly Hallows: Part 2 (video game)
 * LEGO Harry Potter: Years 1-4