This a list of those who died in the series. However, keep in mind that monsters on this page may, will, or have already reformed.

Contents 1 Before the series 2 Percy Jackson and the Olympians 2.1 The Lightning Thief 2.2 The Sea of Monsters 2.3 The Titan's Curse 2.4 The Battle of the Labyrinth 2.5 The Demigod Files 2.6 The Last Olympian 3 The Heroes of Olympus 3.1 The Lost Hero 3.2 The Son of Neptune 3.3 The Demigod Diaries 3.4 The Mark of Athena 4 Film 4.1 The Lightning Thief

Before the seriesEdit

• Maria di Angelo - Died from a hotel explosion caused by Zeus, which was intended for Nico and Bianca di Angelo's deaths.
• Laura Jackson - Died in a plane crash.
• Jim Jackson - Died in a plane crash.
• Rich Jackson - Died from cancer
• The Oracle's host - Died over thirty years before The Lightning Thief and became mummified after Hades cursed her.
• Grover's Uncle Ferdinand - Died after turned to stone by Medusa.
• Ms. Grace - Died in a car crash due to being drunk.
• Esperanza Valdez - Killed in a fire in her workshop which was caused by Gaea, who later made Leo believe that he himself had accidentally caused the fire.
• Marie Levesque - Killed when Alcyoneus almost rose.
• Hazel Levesque - Killed when Alcyoneus almost rose because of her. Brought back to life by Nico di Angelo
• Michael Varus and his group from Camp Jupiter are defeated in Alaska, their eagle stolen
• Sammy Valdez - Died of old age
• Various demigod children of Athena who were searching for the Athena Parthenos but were either killed by knife or flame by the followers of Mithras or by Arachne.

Percy Jackson and the OlympiansEdit

The Lightning ThiefEdit

• The Minotaur - Percy killed it with one of its horns.
  • Reformed some time before The Last Olympian, but killed again by Percy.
• Hellhound- shot in the side by Chiron.
• The Furies - Alecto was killed at Metropolitan Museum by Percy Jackson, but reformed later in The Lightning Thief.
  • All three Furies were killed on a bus by Percy Jackson, Annabeth Chase, and Grover Underwood, but later reformed again.
• Medusa - Head sliced off by Percy.
• Procrustes - Head sliced off by Percy.
• Unnamed preacher - fell off a cliff during a police chase because he was scamming people. Percy and Grover recognized him in the Underworld.
• A Boar - drowned by Percy in the fight against Ares.
• Gabe Ugliano - Killed when Sally Jackson turned him to stone with Medusa's head.
• Pit Scorpion - chopped in half by Percy.

The Sea of MonstersEdit

• Laistrygonian Giants- killed by Annabeth, Tyson, and Percy.
• Joe Bob - stabbed by Annabeth.
• Skull Eater - Killed when Tyson punched him in the face.
• Marrow Sucker - Killed when Tyson Deflected a Flaming Dodgeball.
• Stymphalian Birds - Killed by Apollo Demigods in Camp Half-Blood.
• The Hydra - Killed by the CSS Birmingham's cannons.
• Confederate Sailors - When the CSS Birmingham exploded (though technically already dead).
• Oreius - shot in the mouth by a centaur with a bow and arrow.
• Agrius - Kicked in the head by Blackjack.
• Probably other monsters killed by campers while the Questers are away.

The Titan's CurseEdit

• Nemean Lion - Killed by space food, and Zoe's arrows at the Smithsonian
• Dr. Thorn the Manticore - Killed by Dionysus
• Talos (prototype) - Killed by Bianca di Angelo.
• Bianca di Angelo - Died when the malfunctioning Talos prototype, a creation of Hephaestus, toppled over onto an electric cable with her inside. Her body was never found.
• Skeleton Warrior(s) - banished to the Underworld by Bianca. Another group were sent to the Underworld by Nico di Angelo
• Zoë Nightshade - Killed by Ladon's poison and Atlas' (her father) final blow.
• There were many monsters killed when Dr. Chase rescued everyone.

The Battle of the LabyrinthEdit

• Tammi - Killed by Percy in Goode High School
• A boy from Seattle - He was mentioned by Kelli to Luke that he was just a snack.
• Antaeus - stabbed by Percy in his third and final duel.
• Dracaenae - Killed in Percy's first duel (out of three).
• Centaur - Killed by a Laistrygonian Giant in a duel.
• Geryon- Killed by Percy shooting an arrow hitting all three of his hearts.
• Pan - Faded away because of the nature and wild dying.
• Many animals (including Dede the Dodobird, a sabertooth tiger, and a wooly mammoth) were turned to dust when Pan faded.
• An Unnamed Satyr - trampled on and presumably killed by a Hellhound (see below) Percy started to help him when Juniper's tree started burning.
• A Hellhound - After killing a Satyr, it targeted Percy and was stabbed with Anaklusmos.
• Kelli - Killed by Annabeth in the Labyrinth.
• Kampê - Killed by Briares near Zeus's Fist.
• Lee Fletcher, son of Apollo - Brought down by a giant.
• Castor, son of Dionysus - Brought down in battle.
• Daedalus - Nico released his spirit.
• There were many unrecorded deaths in the Battle of the Labyrinth including those of many Camp Half-Blood campers, enemy demigods, and monsters.

The Demigod FilesEdit

• Keres - Killed by Percy, Thalia, and Nico during an ambush.
• Stymphalian Birds - Killed by Percy and Clarisse
• Myrmekes - Electrocuted and burned by the Bronze dragon, in order to rescue Beckendorf.
• The Bronze Dragon - shut down by Beckendorf after it went rogue. Later rebuilt.

The Last OlympianEdit

• Charles Beckendorf - Died in the explosion of the Princess Andromeda.
• Hundreds of Kronos's warriors- Destroyed in the explosion of the Princess Andromeda.
• The Minotaur - Reformed since The Lightning Thief, though is soon killed by Percy again with his own axe.
• Michael Yew - Died (presumably) when Percy stabbed Riptide into Williamsburg Bridge.

  

• Leneus - Killed in The Battle of Manhattan, reincarnates into a Laurel tree.
• Hyperion - Turned into a maple tree by Grover and the satyrs.
• The Clazmonian Sow - Killed by Percy, with the assistance of a few automatons.
• Silena Beauregard - Died fighting a drakon.
• Lydian Drakon - Killed by Clarisse after Silena's death
• An unnamed Child of Ares - Eaten by the Lydian Drakon
• Queen Sess - Shot by Chiron with a bow and arrow.
• Ethan Nakamura - died when a shard of his own sword hit him in the stomach after he slashed at Kronos. He was later sucked into a fissure on Olympus.
• Kronos - Dissolved to dust when Luke Castellan stabbed himself with Annabeth's dagger. He is not dead, but has spread so thin that he'll never be able to form a consciousness again (as said by Hermes).
• Luke Castellan - Killed himself to stop Kronos from evolving into his true form.
• Unknown child of Apollo - Is seen being dragged off by hellhound, likely dead.
• A Hunter- Said to be knocked out of a tree by enemy arrows.
• The Oracle, who was already dead, was now dissolved so that Rachel Elizabeth Dare could take the spirit of the Oracle.
• There were many unrecorded deaths in The Battle of Manhattan as there was simply too many to count and too little time.
• Many Nature Spirits were killed by Titan Army Scouts.
• Typhon-  Chained, stabbed by Poseidon, and sent down a "slip-n-slide" into Tartarus.
• 20 Satyrs at Fort Washington.

The Heroes of OlympusEdit

The Lost HeroEdit

• Venti - Dissolved when Jason stabbed them.
• Sump - Killed by Leo's Machine (reformed almost instantly)
• Torque - Killed by Leo's Machine (reformed almost instantly)
• Ma Gasket - Smashed by a Machine (reformed almost instantly)
• Festus - Shot down by lasers
• Two sun dragons - Destroyed in an explosion
• King Midas - Presumably killed by a crowd of his victims
• Lityerses - Turned to gold
• Earthborn - Killed by Jason, Piper, and Leo. Several were also killed by the Hunters later
• Lycaons - Killed by the Hunters of Artemis
• Enceladus - Killed by Jason with a lighting bolt from Zeus
• Jason - Killed when Hera showed her true form, hence the line in the prophecy "death unleash through   Hera's rage". He was later brought back to life by Piper 's charmspeak .

The Son of NeptuneEdit

• Stheno - Drowned by Percy in the Tiber (later reforms)
• Euryale - Drowned by Percy in the Tiber (later reforms)
• Gwen - Presumably killed by Octavian (comes back due to the open Doors of Death)
• Three Basilisks - Killed by Frank's skeletal warrior Gray
• Phineas - Poisoned with Gorgon blood by Percy during a bet.
• Otrera- killed by Hylla twice
• Six Laistrygonians - Killed by Frank with Gray
• Laistrygonian Giants - Killed during the escape from the Zhang mansion.
• Gryphons - Killed by Percy, Frank and Hazel (reformed).
• Shade Army - Killed by Percy when he destroyed the frozen camp.
• Alcyoneus - Killed by Frank and Hazel with the help of Arion.
• Enemy Cyclopes - Killed by the Fifth Cohort.
• Wild Centaurs - Killed by the Third and Fifth Cohorts.
• Karpoi Spirits - Killed by Percy with the Eagle.
• Basilisks - Killed by Percy with the Eagle.
• Multiple Earthborn - Killed by Percy with the Eagle. Some killed by Tyson with the help of Ella.
• Hundreds of other monsters - Killed by the Amazons and the 12th Legion.
• Polybotes - Killed by Percy with Terminus' head.
• Implied Roman campers- in battle at Camp Jupiter
• Multiple enemy Hellhounds killed by the Roman campers.

The Demigod DiariesEdit

• Halcyon Green - sacrificed himself in an explosion of Greek Fire to let Luke Castellan and Thalia Grace escape
• Leucrotae - two killed by Greek fire and one was engulfed by deadly curtain drapes
• Cacus - hit with metal claw by Annabeth then shot with Hermes' caduceus in laser mode by Percy
• Burly Black - set on fire by Lamia to horrify Dr. Howard Claymore
• Lamia - killed multiple times by Claymore
• Dr. Howard Claymore - sacrificed himself so that Alabaster could defeat Lamia (his soul now occupies a Mistform body)

The Mark of AthenaEdit

• Three Eidolons - the eidolons impersonate Archimedes' robots, but Leo manages to trap them inside the robots' wiring and make them short-circuit.
• Ephialtes and Otis - killed by Bacchus, with help from Percy and Jason.

FilmEdit

The Lightning ThiefEdit

• The Minotaur - attempted with Riptide, Percy killed it with one of its horns.
• Medusa - Head was cut off by Percy Jackson.
• Hydra - Turned to stone by Medusa's head.
• A Hysterical woman - Turned to stone by Medusa.
• The Hysterical Woman's husband - Turned to stone by Medusa before the woman (not shown)
• Gabe Ugliano - Turned to stone when opening the fridge with Medusa's Head in it.