Harold

 has several meanings pertinent to the Doctor Who universe and the real world. They are listed below in alphabetical order by surname. If no surname is available, alphabetisation occurs by the disambiguation term — that is, the bit between the parentheses in a title like Waitress (Vincent and the Doctor).

As only name

 * Harold (The Broken Crown) (AUDIO: The Broken Crown)
 * Harold (Deimos) (AUDIO: Deimos / The Resurrection of Mars)
 * Harold (The Green Man) (AUDIO: The Green Man)
 * Weird Harold (PROSE: Vampire Science)

As first name

 * Harold Chorley (TV: The Web of Fear, PROSE: Still Lives)
 * Harold Godwinson (TV: The Time Meddler, PROSE: The Real Hereward, AUDIO: Mary's Story)
 * Harold Hussey (PROSE: Of the Mermaid and Jupiter)
 * Harold Macmillan (AUDIO: The Pelage Project)
 * Harold Reitman (PROSE: Dying in the Sun)
 * Harold Saunders (AUDIO: The Doll of Death)
 * Harold Schoonhover (PROSE: Pack Animals)
 * Harold V (TV: The Happiness Patrol)
 * Harold Wilson (PROSE: Who Killed Kennedy, AUDIO: State of Emergency)
 * Harold Withers (AUDIO: The Eternal Summer)
 * Harold Wyntonia (COMIC: Mistress of Chaos)

As an alias

 * Harold (The Undertaker's Gift) (PROSE: The Undertaker's Gift)
 * Harold Jones (PROSE: Touched by an Angel)
 * (TV: The Sound of Drums / Last of the Time Lords, The End of Time)
 * Harold Sullivan (COMIC: Agent Provocateur)

Actors

 * Harold Goldblatt, who played Dale in TV: Frontier in Space
 * Harold Innocent, who played Gilbert M in TV: The Happiness Patrol and voiced Freeth in AUDIO: The Paradise of Death