SPOILER WARNING: Part 1-8 spoiler details may follow.
JoJo's Bizarre Adventure is often noted for the amount of casualties and fatalities that occurs throughout the series. The following is a comprehensive list of the deceased (either physically or mentally) from Phantom Blood through the ongoing JoJolion, as well as any other JoJo-related media.
Please note that this list consists primarily of canonical deaths; the deaths of characters from one-shots or light novels not written by Hirohiko Araki listed below may or may not be considered canon.
After Kyoka Izumi fails twice the test of the gods of the mountains, her loved ones pay the price. Kyoka's mother dies of a heart attack while driving with Kyoka's fiancé. In the resulting accident, both die.
A gym patron frequenting the same gym as Yoma Hashimoto. Having booked Yoma's personal trainer at the same time Yoma wanted to be coached, the patron is assaulted by Yoma who locks him in a stranglehold and beats him against a wall until death.
As former soldiers, the firefighters experience the death of an enemy they killed on the battlefield. The first of them dies with a gruesome shot to the head. The second firefighter has his body riddled with bullets.
Drowned after Masago's yacht crashes onto a rock, and her body is retrieved on deck. Masago blames her for having them crash onto a rock by taking off her clothes and distracting him. Flies start buzzing around her corpse six days later. Later on, a cannibalistic Masago plans to eat her corpse, but her corpse was already snatched by nearby sharks, leaving only her foot behind.
Stranded on a boat in the middle of the sea with no communication device, an insane Ayashi tries to kill and eat his cat, Dolce. Ayashi eventually catches Dolce and takes a bite out of him, but Dolce dives into his Ayashi's throat and forces his neck and chest to burst open, killing him. His body plunges into the shark-infested waters afterwards.
In the manga, Dordo returns to Dr. Kasuminome after having failed to assassinate Baoh and is executed by Walken. The psychic atomizes him. In the OVA, Dordo tries to snipe Baoh with an explosive bullet but Baoh returns the bullet back at his helicopter, making it explode. Dordo dies in the crash.
Don Peckinpah and Mike Harper decide to play poker and in a crucial hand, both of them cheat to display a four of a kind, queen. While they both draw their guns at each other, an old beggar uses the opportunity to throw a molotov cocktail at them, killing them both.
Pinkerton detectives pursuing the outlaw man. One of their own tries to ambush the outlaw but is defeated. When the rest of the group comes, they execute him for trying to get the bounty alone. The rest of them are then ambushed by the outlaw. Although the detectives hide behind a rock, the outlaw uses ricochets to kill two of them and gravely wound the third man.
An assassin tries to attack Irene with a deadly swarm of fire ants, protecting herself with a bug repellant. Irene's make-up also repels the ants and she hypnotizes the assassin with her lipstick. The assassin is forced to open her mouth and let the bugs go inside her throat. She also falls out of the window.
Murdered by Takuma using his stand, The Book. Takuma projects a fatal memory of a car cash, based on a memory from his own life onto Orikasa, having her bleed out. She is witnessed by her cat, Trinita, who Takuma doesn't kill due to his ability not working on cats.
After punching Vittorio Cataldi's chest with Kraft Work, attempting to lock his heart in place, Vittorio reflects the attack using his stand Dolly Dagger. Vittorio kicks Sale's body showing his heart locked in the air, which leads to Sale's death.
Controlled by Manic Depression, he is used to attack Sheila E. After getting trapped by Voodoo Child's lips, Zucchero's body crumples, his blood is gushed out, and he starts to inflate, destroying his body.
After trapping Pannacotta Fugo by locking the sensation of stumbling onto him with Rainy Day Dream Away, he then trapping Sheila E by locking the thought of not being able to win the fight. Afterwards, he starts to interrogate Cannolo Murolo, giving enough time to Fugo reappear and punch him with Purple Haze, breaking Kocaqi's neck and destroying his body with Purple Haze's killer virus.
In an attempt to kill Cannolo Murolo, he stabs himself with Dolly Dagger, reflecting part of the damage to Murolo, however, the damage is minimized due to Murolo's stand All Along the Watchtower. After trying multiple times to cause significant damage to Murolo, Vittorio bleeds out.
After stabbing Fugo and traps him in a zombie-like horde controlled by her stand Nightbird Flying, she makes herself easy to spot. Fugo manages to attack Angelica with Purple Haze, destroying her body with Purple Haze's killer virus.
Cioccolata37, Secco37, Prosciutto37, Pesci37, Ghiaccio37, and Melone37 ambush and murder them. Secco's Evil Dead conceals the harbor, making their actions invisible to those within the island, such as Bruno Bucciarati37. One man manages to escape and tries waving desperately toward Morioh for help before he is killed as well. The Mafia members move the bodies out of sight by dropping the bodies in the water between the boats, or by tossing them into the tall grass by the side of the road to the harbor.
Peter's plane was falling apart, he thinks about jumping on Jorge's plane, but Jorge doesn't let that happen because the wreckage of Peter's plane would fall on his plane, Peter ends up falling from a long height and eventually dying.
Jim starts convulsing and groaning. Antonio Torres had dived into Jim's mouth, causing Jim to shove his hands deep into his mouth. He pulls out his tongue, along with flesh, parts of his ribs, and his internal organs. Jim slowly asks George Joestar II to help him and then dies.
When George sees that Steven is late to be the best man for his wedding, he heads to the Motorize residence only to find the carpet on the staircase seeped with blood. He is confronted by Kenton, now a zombie, who lunges herself at him. George has no choice but to decapitate her with a fireplace poker.
Antonio Torres's fate is sealed when Lisa Lisa hits him with a Ripple Technique empowered by the Red Stone of Aja: the Sunset Orange Overdrive. The Ripple slowly but surely disintegrates his giant body, although Kars prolongs his life by accelerating time and make him molt more skin. He dies offscreen.
Kicks Jotaro with The World after being countered with a Time Stop by Jotaro and Star Platinum. However, Star Platinum's fist connects with The World's leg, shattering the Stand and DIO with it. The resulting force and impact causes DIO's head and right arm to explode.
Tries escaping to multiple parallel dimensions, but is confronted by Heaven Ascension DIO who teleports him to his alternate universe. Valentine is then interrogated as DIO asks him what information he told Jotaro. DIO offers to give Valentine the reality that he wishes for, and that it would be a shame to kill a powerful Stand user like him. Without a speck of hesitation, Valentine refuses for the sake of justice. He essentially buys some time for the Joestars by sacrificing himself, allowing them to prepare before taking on DIO. After Valentine is defeated, DIO overwrites his reality with The World Over Heaven, and he ceases to exist.
Faced with interrogation after his defeat at the hands of Jotaro Kujo and Jolyne Cujoh, refuses to tell the Joestar Group any secrets regarding DIO's new Stand. Instead, he climbs the banister in the Joestar Mansion and throws himself off, committing suicide as he is impaled upon the statue of the Joestar family's guardian angel.
Attempts to kill Jotaro in his alternate universe, but fails to do so after the latter throws the armlet of the original DIO at him. The two armlets collide based on the principle of two similar objects from different universes cancelling each other out. This completely destroys DIO's arms, allowing Jotaro an opportunity to win. Star Platinum: The World Over Heaven delivers several rush punches to DIO, causing him to explode and become erased from history. Thus, the reality that was altered by DIO reverts and sends everybody home to their original timelines. Only Jotaro remembers the events that occurred but in the new timelines, the allies who originally died would now remain alive.