Vernon Dursley
Harry's uncle, a great believer in rules and what he deems 'normal'
Petunia Dursley
Harry's mother's sister, who was indignant that her parents were proud of Lily's magical abilities
Dudley Dursley
Harry's cousin and the tormentor of his childhood
Minerva McGonagall
Head of Gryffindor House, Deputy Headmistress and Transfiguration teacher at Hogwarts
Harry Potter
the hero of the story
Ted
a news reporter on TV
Jim McGuffin
a weather man on TV
Albus Dumbledore
Harry's mentor, a brilliant wizard who is Headmaster of Hogwarts and member of the Wizengamot
Dedalus Diggle
a man who 'never had much sense'
Lord Voldemort
The principle villain, the wizard who killed Harry's parents and many others
Madam Pomfrey
the matron at Hogwarts School
Lily Potter
Harry's mother who sacrificed herself to save him
James Potter
Harry's father, remembered at Hogwarts for playing Chaser on the Gryffindor Quidditch team
Rubeus Hagrid
a giant of a man who works as gamekeeper and Keeper of Keys and Grounds at Hogwarts, one of Harry's closest friends
Sirius Black
a man Hagrid borrowed a flying motorbike from
Mrs Figg
an elderly neighbour and occasional babysitter of Harry's
Tibbles, Snowy, Mr Paws and Tufty
cats owned by Mrs Figg whose pictures she makes Harry look at whenever she babysits him
Marge
someone the Dursleys know who apparently hates Harry
Yvonne
a friend of Aunt Petunia's
Piers Polkiss
Dudley's best friend
Dennis, Malcolm and Gordon
friends of Dudley's and members of his gang
The McKinnons, the Bones and the Prewetts
some of the 'best witches and wizards of the age', all killed by Voldemort
Cornelius Fudge
the Minister of Magic
Miranda Goshawk
author of The Standard Book Of Spells series
Bathilda Bagshot
author of A History of Magic
Adalbert Waffling
author of Magical Theory
Emeric Switch
author of A Beginner's Guide To Transfiguration
Phyllida Spore
author of One Thousand Magical Herbs and Fungi
Arsenius Jigger
author of Magical Drafts and Potions
Newt Scammander
author of Fantastic Beasts and Where To Find Them
Quentin Trimble
author of The Dark Forces: A Guide To Self-Protection
Tom
the barman at The Leaky Cauldron
Doris Crockford
a woman who shook Harry's hand repeatedly in The Leaky Cauldron
Professor Quirrell
the Defense Against the Dark Arts teacher at Hogwarts, turned out to be a dark wizard
Griphook
a goblin working at Gringotts bank
Madam Malkin
owner of Madam Malkin's Robes For All Occasions in Diagon Alley
Draco Malfoy
a pale boy with a pointed face, Harry's arch enemy at Hogwarts
Mr Malfoy
Draco Malfoy's father
Mrs Malfoy
Draco Malfoy's mother
Professor Vindictus Viridian
author of Curses and Counter Curses (Bewitch your Friends and Befuddle Your Enemies with the Latest Revenges: Hair Loss, Jelly-Legs, Tongue-Tying and much, much more)
Hedwig
a snowy owl belonging to Harry
Mr Ollivander
owner of Ollivanders wand shop in Diagon Alley
Mrs Weasley
the mother of Harry's best friend
Hermes
an owl belonging to Percy Weasley
Ginny Weasley
the youngest Weasley child and only girl, who is too young to attend Hogwarts
Percy Weasley
the third oldest Weasley brother, currently in his fifth year at Hogwarts and a Gryffindor prefect, who is a great believer in ridgedly following rules
Fred and George Weasley
twin brothers, the fourth and fifth oldest in the Weasley family, currently in their third year at Hogwarts and great pranksters
Ron Weasley
Harry's first and best friend, the sixth oldest in the Weasley family
Neville Longbottom
a 'round-faced, forgetful boy' in Harry's year, who was sorted into Gryffindor despite not appearing to have Gryffindor courage
Trevor
a toad belonging to Neville who keeps trying to escape from him
Mrs Longbottom
Neville Longbottom's grandmother
Lee Jordan
a third year Gryffindor student, friend of Fred and George Weasley, and commentator of Hogwarts Quidditch matches
Weasley cousin
second cousin of Mrs Weasley who is an accountant
Bill Weasley
the oldest Weasley brother who works in Africa for Gringotts
Charlie Weasley
the second oldest Weasley brother who is studying dragons in Romania, famous at Hogwarts for being one of Gryffindor's best Seekers
Scabbers
a rat belonging to Ron who spends all his time sleeping
Mr Weasley
father of Ron and his siblings
Dimpled woman on train
a witch who pushes the food trolley on the Hogwarts Express
Bertie Bott
inventor of Bertie Botts' Every Flavour Beans, a type of wizarding sweet
Agrippa
a famous witch whose picture is on a Chocolate Frog card
Ptolemy
a famous witch or wizard whose picture is on a Chocolate Frog card
Grindelwald
a dark wizard famously defeated by Dumbledore in 1945
Nicolas Flamel
alchemical partner and friend of Albus Dumbledore and creator of the Philosopher's Stone
Morgana, Hengist of Woodcroft, Alberic Grunnion, Circe, Paracelsus and Merlin
famous witches and wizards whose pictures are on Chocolate Frog cards
Hermione Granger
the other best friend of Harry and Ron and the third member of their trio
Vincent Crabbe and Gregory Goyle
thuggish looking friends/bodyguards of Draco Malfoy
The Fat Friar
the Hufflepuff house ghost
Peeves
a poltergeist who causes mayhem at Hogwarts
Sir Nicholas de Mimsy Porpington (Nearly Headless Nick)
the Gryffindor house ghost
Seamus Finnigan
a boy with sandy hair in Harry's year, sorted into Gryffindor
The Sorting Hat
a very old wizard's hat that sorts new students into Hogwarts by looking into their heads and reading their thoughts and characters
Hannah Abbot
a Hufflepuff girl in Harry's year
Susan Bones
a Hufflepuff girl in Harry's year
Terry Boot
a Ravenclaw boy in Harry's year
Mandy Brocklehurst
a Ravenclaw girl in Harry's year
Lavander Brown
a Gryffindor girl in Harry's year
Millicent Bulstrode
a Slytherin girl in Harry's year
Justin Finch-Fletchley
a Hufflepuff boy in Harry's year
Morag McDougal
a boy or girl in Harry's year, house unknown
Moon
a boy or girl in Harry's year, house and first name unknown
Nott
a boy or girl in Harry's year, house and first name unknown
Pansy Parkinson
a Slytherin girl in Harry's year 'with a face like a pug', friend of Draco Malfoy
Parvati Patil and her twin
girls in Harry's year, Parvati was sorted into Gryffindor
Sally-Anne Perks
a girl in Harry's year, house unknown
Dean Thomas
a Gryffindor boy in Harry's year who is even taller than Ron (left out of the Sorting scene in the UK edition)
Lisa Turpin
a Ravenclaw girl in Harry's year
Blaise Zabini
a Slytherin boy in Harry's year (sex confirmed later in the series)
The Bloody Baron
the Slytherin house ghost, who is covered in silver blood stains
Mr Finnigan
Seamus's muggle father
Mrs Finnigan
Seamus's witch mither who didn't tell her husband she was a witch until after they were married
Algie
great-uncle of Neville Longbottom
Enid
great-aunt of Neville Longbottom
Severus Snape
Potions teacher at Hogwarts, old arch-enemy of James Potter and Harry's least favourite teacher
Argus Filch
the caretaker at Hogwarts
Madam Hooch
the flying instructor and Quidditch referee at Hogwarts
The Fat Lady
a woman in a portrait guarding the entrance to Gryffindor Tower
Mrs Norris
a cat belonging to Argus Filch who spies on the students for her master
Professor Sprout
the Herbology teacher at Hogwarts
Professor Binns
the History of Magic teacher at Hogwarts
Emeric the Evil
a historical wizard Harry learns about in his first year at Hogwarts
Uric the Oddball
a historical wizard Harry learns about in his first year at Hogwarts
Professor Flitwck
the Charms teacher at Hogwarts
Fang
a boarhound belonging to Hagrid
Oliver Wood
a fifth-year boy who is captain and Keeper on the Gryffindor Quidditch team, a fanatic of the game
Gregory the Smarmy
a wizard whose statue guards a passageway out of Hogwarts
Fluffy
a giant three-headed dog belonging to Hagrid who guards the third floor corridor on the right hand side
Wizard Baruffio
a wizard who said 's' instead of 'f' when casting a spell and ended up on the floor with a buffalo on his chest
Angelina Johnston
a third-year girl who plays Chaser on the Gryffindor Quidditch team
Marcus Flint
a sixth-year boy who is captain and Chaser on the Slytherin Quidditch team
Alicia Spinett
a third-year girl who plays Chaser on the Gryffindor Quidditch team
Katie Bell
a second-year girl who plays Chaser on the Gryffindor Quidditch team
Adrian Pucey
plays Chaser on the Gryffindor Quidditch team
Bletchley
plays Keeper on the Slytherin Quidditch team
Terence Higgs
a seventh-year boy who plays Seeker on the Slytherin Quidditch team
Madam Pince
the librarian at Hogwarts
The Potter family
Harry sees ten of them in the Mirror of Erised
Harry's grandfather
One of the ten in the Mirror of Erised it is unknown which side of the family he was on, though it's more likely to be the Potter side since the people in the mirror were just called 'the Potters'
Perenelle Flamel
the wife of Nicolas Flamel
Norbert
a Norwegian Ridgeback dragon won as an egg by Hagrid from a stranger in the local pub and eventually sent to Romania
Charlie Weasley's friends
four people who came to take Norbert to Romania
Ronan
a centaur who lives in the Forbidden Forest
Bane
a centaur who lives in the Forbidden Forest
Firenze
a centaur who lives in the Forbidden Forest