Older brother of Dennis Creevey, and member of Dumbledore's Army.

Colin Creevey – Muggle-born Gryffindor student one year below Harry.

Slytherin Quidditch Beater and member of the Inquisitorial Squad.

Vincent Crabbe – Slytherin student in Harry's year and the son of a Death Eater.

Crabbe – Death Eater and father of Vincent Crabbe.

Penelope Clearwater – Ravenclaw prefect and girlfriend of Percy Weasley.

Cho Chang – Ravenclaw Quidditch Seeker one year above Harry, and his first love interest.Reginald Cattermole – Employee of the Magical Maintenance Department for the Ministry of Magic.Professor of Defence Against the Dark Arts for one year, and Deputy Headmaster of Hogwarts under Snape. Amycus Carrow – Death Eater and brother of Alecto Carrow.Professor of Muggle Studies for one year, and Deputy Headmistress of Hogwarts under Severus Snape. Alecto Carrow – Death Eater and sister of Amycus Carrow.Frank Bryce – Muggle gardener for the Riddle family.Charity Burbage – Professor of Muggle Studies at Hogwarts.Member of Dolores Umbridge's Inquisitorial Squad. Millicent Bulstrode – Slytherin student in Harry's year.Lavender Brown – Gryffindor student in Harry's year and member of Dumbledore's Army.Terry Boot – Ravenclaw student in Harry's year.Susan Bones – Hufflepuff student in Harry's year.Amelia Bones – Head of the Department of Magical Law Enforcement, and the aunt of Susan Bones.Killed in the Battle of the Department of Mysteries by his cousin Bellatrix Lestrange.

Escapee from Azkaban prison and member of the Order of the Phoenix. Sirius Black – Harry's godfather who was a close friend of Harry's father James.His painting hangs in the office and assists the current headmaster. Phineas Nigellus Black – Great-great-grandfather of Sirius Black and former Hogwarts headmaster.Cuthbert Binns – ghost, History of Magic professor.Katie Bell – Gryffindor Quidditch Chaser one year above Harry Potter.Bathilda Bagshot – Author of A History of Magic, and the great aunt of Gellert Grindelwald.Ludo Bagman – Head of the Department of Magical Games and Sports within the Ministry of Magic.Hannah Abbott – Hufflepuff student in Harry Potter's year.

The characters in harry potter