Alphabet Castle is an educational children's television program produced in the UK and created by Michael Cole. It began in September 1993 with a series of 27 episodes aired on CITV, and ran until December 1995. It had three main characters: King Alpha, Queen Bet, and Gobbledygook, an animated turkey. It starred Stephen Cannon and Joanne Campbell. Music was by Paul Reade.

A total of three series and 65 editions were produced by Michael Cole productions for Carlton Television. Like its near namesake, Alphabet Zoo, a decade earlier, each episode was dedicated to a letter of the alphabet (although this format was dropped for the final series); episodes were generally around 10 minutes in length, and were broadcast in CITV on Wednesday afternoons.