Students

Gryffindors

• Same year as Harry
  • Harry Potter
  • Hermione Granger
  • Ron Weasley
  • Neville Longbottom
  • Lavender Brown
  • Seamus Finnigan
  • Parvati Patil
  • Dean Thomas

• Older Gryffindors
  • Katie Bell
  • Lee Jordan
  • Angelina Johnson
  • Alicia Spinnet
  • Percy Weasley
  • Fred and George Weasley
  • Oliver Wood

• Younger Gryffindors
  • Ginny Weasley
  • Colin and Dennis Creevey

Ravenclaws

• Same year as Harry
  • Terry Boot
  • Anthony Goldstein
  • Padma Patil
  • Mandy Brocklehurst (Sorting hat)
  • Lisa Turpin (Sorting hat)

• Different year than Harry
  • Luna Lovegood
  • Cho Chang
  • Penelope Clearwater
  • Marietta Edgecombe

• Unknown year
  • Michael Corner

Hufflepuffs

• Same year as Harry
  • Hannah Abbott
  • Susan Bones
  • Justin Finch-Fletchley
  • Ernie Macmillan

• Different year than Harry
  • Cedric Diggory

• Unknown year
  • Zacharias Smith

Slytherins

• Same year as Harry
  • Draco Malfoy
  • Vincent Crabbe
  • Gregory Goyle
  • Millicent Bulstrode
  • Theodore Nott
  • Pansy Parkinson
  • Blaise Zabini

• Different year than Harry
  • Adrian Pucey

Other Schools

• Fleur Delacour (Beauxbatons)
• Viktor Krum (Durmstrang)

Teachers and Hogwarts employees

• Albus Dumbledore (Hogwarts headmaster)
• Armando Dippet (former Hogwarts headmaster)
• Phineas Nigellus (former Hogwarts headmaster)

Heads of Houses

• Minerva McGonagall (Transfiguration) - Head of Gryffindor House
• Severus Snape (Potions) - Head of Slytherin House
• Filius Flitwick (Charms) - Head of Ravenclaw House
• Pomona Sprout (Herbology) - Head of Hufflepuff House

Defence Against the Dark Arts professors

• Professor Quirrell
• Gilderoy Lockhart
• Remus Lupin
• Alastor Moody
• Dolores Umbridge

Other Hogwarts teachers

• Professor Binns (History of Magic)
• Firenze (Divination)
• Wilhelmina Grubbly-Plank (Care of Magical Creatures)
• Rubeus Hagrid (Care of Magical Creatures)
• Madam Hooch (Flying)
• Professor Kettleburn (Care of Magical Creatures)
• Professor Sinistra (Astronomy)
• Sibyll Trelawney (Divination)
• Professor Vector (Arithmancy)

Other Hogwarts employees

• Dobby (house-elf worker)
• Argus Filch (caretaker)
• Irma Pince (librarian)
• Poppy Pomfrey (nurse)
• Winky (house-elf worker)

Other schools

• Igor Karkaroff (Durmstrang headmaster)
• Olympe Maxime (Beauxbatons heatmistress)

Ghosts and other denizens

• Moaning Myrtle
• Professor Binns
• Peeves
• Other Hogwarts ghosts
• Portraits in Hogwarts

Other wizards and witches

Ministry of Magic

• Cornelius Fudge
• Barty Crouch
• Ludo Bagman
• Amelia Bones
• Amos Diggory
• Bertha Jorkins
• Broderick Bode

Order of the Phoenix

• Aberforth Dumbledore
• Dedalus Diggle
• Sirius Black
• Elphias Doge
• Remus Lupin
• Alastor Moody
• Nymphadora Tonks
• Arthur Weasley
• Molly Weasley
• Bill Weasley
• Charlie Weasley
• Kingsley Shacklebolt
• Minerva McGonagall
• Arabella Figg
• Mundungus Fletcher
• Severus Snape
• Frank and Alice Longbottom
• Sturgis Podmore

Death Eaters and other Dark wizards

• Lord Voldemort
• Lucius Malfoy
• Bellatrix Lestrange
• Peter Pettigrew
• Barty Crouch Jr.
• Further listings

Miscellaneous

• Nicholas Flamel
• Grawp
• Grindelwald
• Narcissa Malfoy
• Mr. Ollivander
• Madam Rosmerta
• Newt Scamander
• Rita Skeeter
• Andromeda Tonks
• Ted Tonks
• Kennilworthy Whisp
• Ernie Prang and Stan Shunpike

Muggles

Dursleys

• Dudley Dursley
• Marjorie Dursley (Aunt Marge)
• Petunia Dursley
• Vernon Dursley

Miscellaneous

• Frank Bryce
• Mark Evans

Squibs

• Arabella Figg
• Argus Filch

Families

• The Dursley, Evans and Potter families
• The Weasley family
• The Malfoy family
• The Black family
• The Crouch family
• The Granger family

Pets

Owls

• Errol (Weasley family's owl)
• Hedwig (Harry's owl)
• Hermes (Percy's owl)
• Pigwidgeon (Ron's owl)

Cats

• Crookshanks (Hermione's cat who is part kneazle)
• Millicent Bulstrode's cat (name unknown)
• Mrs. Norris (Argus Filch's cat)

Dogs

• Fang (Hagrid's dog)
• Fluffy (Hagrid's three-headed dog)
• Ripper (Aunt Marge's dog)

Other

• Binky (Lavender Brown's rabbit)
• Fawkes (Albus Dumbledore's phoenix)
• Nagini (Voldemort's snake)
• Norbert (Hagrid's baby dragon, which is now in Romania with Charlie Weasley)
• Scabbers (Ron's rat)
• Trevor (Neville Longbottom's toad)

Magical beasts

See the page on magical beasts.