Halley's Comet is a short-period comet visible from Earth every 75–77 years.

Halley's Comet or Haley's Comet may also refer to:

• Halley's Comet (video game), a 1986 arcade game
• "Haley's Comet", a song by Dave Alvin from the album Blue Blvd (1991)
• "Halley's Comet", a song by Billie Eilish from the album Happier Than Ever (2021)

• Halley's Comet Opal, gemstone discovered in 1986 when the comet was visible
• Bill Haley & His Comets, band named for the comet
  • Bill Haley and His Comets, their self-titled album

This disambiguation page lists articles associated with the title Halley's Comet.
If an internal link led you here, you may wish to change the link to point directly to the intended article.