An energy being or astral being is a theoretical life form that is composed of energy rather than matter. They appear in myths/legends, paranormal/UFO accounts, and in various works of speculative fiction.

Energy beings are typically rendered as a translucent glowing fluid or as a collection of flames or electrical sparks or bolts; somewhat in common with the representations of ghosts.

Energy beings have a variety of capacities. The Taelons (from Earth: Final Conflict) are barely more powerful than mortals, while others such as Star Trek's Q, Stargate SG-1's Ascended Ancients/Ori, Ben 10: Alien Force's Anodites, or the Meekrob from Invader Zim possess god-like powers.

• Vorlons (Babylon 5)
• Some of the First Ones (Babylon 5)
• The extraterrestrial Paul in the science-fiction film of the same name, although not constructed of energy, can manipulate energy both telepathically and physically. He can repair damaged tissue in a form of resurrection, and he can also project an image of the Universe into a human mind and make them comprehend the immensity of space-time. His home galaxy is the Andromeda Galaxy, thus placing him in this category.
• Organians (Star Trek)
• Prophets and Pah Wraiths (Star Trek)
• The Q (Star Trek)
• Etherials from Marvel Comics
• Ascended people in Stargate SG-1
• Drej (Titan A.E.)
• C'tan (Warhammer 40,000)
• Naaru and Ethereals (World of Warcraft)
• The Taelons (Earth: Final Conflict)
• Gwen Tennyson, and her grandmother Verdona are Anodites from Ben 10: Alien Force
• Cirronians and possibly Vardians (Tracker)
• The astronaut David Bowman is transformed into a 'Star Child' at the conclusion of 2001 A Space Odyssey
• Kheldians and Nictus (City of Heroes).
• FMians, AMians, UMAs, and Wizards from Megaman Starforce which also have the ability to merge with a human in which form they can go between energy and physical.
• Andromeda (Heroes of Newerth)
• The Meekrob from Invader Zim
• The Embers of Muuat and the Ghosts of Creuss from Twilight Imperium
• The Zoni (Ratchet & Clank)
• Archons and Dark Archons in the StarCraft game franchise
• Zzzax (Marvel Comics)
• Pyron (Darkstalkers)
• Tornatron
• Living Laser (Marvel Comics)
• Singularity in Marvel Comics
• Akira from Akira
• Yog, an amoeba-like Energy being from Space Amoeba
• Melllvar and his mother from Futurama
• Outsiders from XCOM: Enemy Unknown
• Bill Cipher (Gravity Falls)
• The pure intellectuals from the Skylark (series)
• The Novakid Race from the game Starbound.

• Anchimayen
• Demons
• Jinn
• Angels