Captain of the High School Baseball Team - Shot by Chief Wiggum.
Seymour Skinner, Nelson Muntz, Kearney Zzyzwicz, Dolph Starbeam, J. Loren Pryor, Jimbo Jones, Doris Freedman, Gary Chalmers, and Groundskeeper Willie - Crushed when the devil destroyed the school under Bart's orders.
Mascots including Lard Lad - Died after nobody looked at them.
Martin Prince - Strangled to death by Willie.
Sherri and Terri, Nelson Muntz, Ralph Wiggum, Jimbo Jones, Kearney Zzyzwicz, and Dolph Starbeam - Murdered by Willie in numerous ways.
FOX Censor - Stabbed to death by the TV Parental Guidance screen bug.
Edna Krabappel, Elizabeth Hoover, Herman Hermann, Comic Book Guy, Kirk Van Houten, Brandine Spuckler, Luann Van Houten, Milhouse Van Houten, Rod Flanders, Todd Flanders, Helen Lovejoy, Bumblebee Man, Timothy Lovejoy, Jr., Krusty the Clown, Charlie, Gary Chalmers, Lindsey Naegle, Jeremy Freedman, Joe Quimby, Kent Brockman, Luann Van Houten, Agnes Skinner, Jessica Lovejoy, Nelson Muntz, Sherri, Terri, Abraham Simpson, and Old Jewish Man - Disintegrated when the bomb hit Springfield.
Johnny and Edgar Winter - Ran over by Homer.
Charles Montgomery Burns, Barney Gumble, Apu Nahasapeemapetilon, Carl Carlson, Lenny Leonard, Moe Szyslak, Sideshow Mel, Waylon Smithers, Jr., Clancy Wiggum, Ned Flanders, Cletus Spuckler, Otto Mann, Seymour Skinner, Lionel Hutz, Groundskeeper Willie, Captain Horatio McCallister, and Dr. Hibbert - Turned into mutants and shot by Marge, Bart, and Lisa with shotguns.
Luann Van Houten, Agnes Skinner, and Elizabeth Hoover - Burned at the stake.
Lisa Simpson - Killed by the angry mob after Homer accused her of being a witch.
Marge and Abraham Simpson - Staked in the heart by an angry mob.
Bart Simpson - Killed by an angry mob with a bear trap.
Homer Simpson - Choked on a piece of broccoli.
Agnes Skinner - Dropped by ghost Homer.
Simpson Children - Seen as skeletons.
Goldilocks - Mauled by the bears.
Rapunzel - Scalp ripped off by Homer.
Suzanne the Witch - Burned to ashes.
Captain Horatio McCallister - Killed by the dolphins.
Squeaky-Voiced Teen - Killed by the dolphins.
Kent Brockman - Killed by the dolphins.
Apu Nahasapeemapetilon, Akira, Comic Book Guy, Carl Carlson, Reverend Lovejoy, Hans Moleman, Gil Gunderson, Raphael, Fat Tony, Louie, Legs, Luigi, Luann Van Houten, Lunchlady Doris, Montgomery Burns,Waylon Smithers, Disco Stu, Cookie Kwan, Judge Constance Harm, Lionel Hutz, Sideshow Bob, and Arnie Pye - Died in the battle.
Groundskeeper Willie - Killed by the dolphins.
Many Springfieldians including Krusty the Clown - Drowned.
Abraham Simpson - Burned by Homer with a flaming log.
Homer Simpson - Shot by Marge.
Grim Reaper - Bludgeoned by Homer with a bowling ball.
Jasper - Soul harvested by Homer.
Homeless Man - Soul harvested by Homer.
Baseball Crowd (Including Lindsey Naegle, Kirk Van Houten, Reverend Lovejoy, and Hans Moleman) - Souls harvested by Homer.
The Queen - Hit in the head with a baseball.
Patty Bouvier - Soul harvested by Homer.
Ned Flanders - Heart ripped out by Jonathan Frink, Sr.
Seymour Skinner - Spine ripped out by Jonathan Frink, Sr.
5 Scientists - Brains removed by Jonathan Frink, Sr.
Sideshow Mel, Very Tall Man, Bumblebee Man, Superintendant Chalmers, Eddie, Snake Jailbird, Reverend Lovejoy, Otto Mann, Cletus Spuckler, Clancy Wiggum, and Apu Nahasapeemapetilon - Body parts ripped off by Jonathan Frink, Sr.
Jonathan Frink, Sr. - Kicked in the groin by Jonathan Frink.
Everyone in the universe including God - Sucked into the vortex that Kang and Kodos made.
David - Sliced in half by Bart.
Lenny, Carl, Barney, Bumblebee Man, Reverend Lovejoy, Sideshow Mel, Mr. Largo, Dr. Nick, Dr. Hibbert, Principal Skinner, Groundskeeper Willie, Apu, Otto, Lou, Squeaky-Voice Teen, Kirk Van Houten, Kent Brockman, Comic Book Guy, Blue-Haired Lawyer, Krusty the Clown, the Yes Guy, and Captain McCallister - Shot by Mr. Burns.
Moe Szyslak and Clancy Wiggum - Impaled on a weather vane.
Professor Frink - Eaten by Homer
Charles Montgomery Burns and Waylon Smithers - Knocked out by Marge with pans.
People on a plane including Superintendant Chalmers - Coughed out by the plane robot onto a freeway.
Various people in Springfield - Killed in the robot battle.
Krusty the Clown - Shredded in a woodchipper.
George Clooney - Drowned in cement mixed with quicksand by Homer.
Prince - Stabbed to death by Homer with his own guitar.
Neil Armstrong - Bludgeoned by Homer with a golf club.
Kate Winslet - Killed by Homer.
Edna Krabappel, Arnie Ziff, Carl Carlson, Lenny Leonard, Barney Gumble, Moe Szyslak, Lou, Eddie, and Sideshow Bob - Killed by the celebrities.
Clancy Wiggum - Shot by Edward G. Robinson.
Homer Simpson - Head blown off by Krusty.
Seymour Skinner - Lobotomized by the Grand Pumpkin.
The Grand Pumpkin - Head blown open by Tom.
Many students at the party including Kang, Kodos, Richard, Nina Skalka, Francine Rhenquist, Lewis Clark, Ralph Wiggum, Jimbo Jones, Nelson Muntz, Kearney Zzyzwicz, Dolph Starbeam, Shauna, Jessica Lovejoy, Sherri and Terri, Bart Simpson, Lisa Simpson, Milhouse, and Nikki - Eaten by Tom.
Charles Montgomery Burns, Snake Jailbird, Patty and Selma, Sideshow Bob, and an Unknown Victim - Dismembered by Ned under Homer's orders.
Homer Simpson - Strangled by God.
Two Squirrels - Heads bitten off.
Superintendent Chalmers, Eddie, Lou, Apu, Seymour Skinner, Lenny Leonard, Carl Carlson, Moe Syzslak, Barney Gumble, Otto Mann, Comic Book Guy, Cletus, Brandine, Jimbo Jones, Kearney Zyzzwicz, Dolph Starbeam, Nelson Muntz, Lisa Simpson, Ralph Wiggum, and Snake Jailbird - Killed by the inhabitants on Rigel 7.
Jimbo Jones, Nelson Muntz, Kearney Zzyzwicz, and Comic Book Guy - Turned into zombies.
Ralph Wiggum - Decapitated by the head of Jebediah Springfield.
Lard Lad Mascot - Eaten by Cyclops Chief Wiggum.
Edna Krabappel - Possibly killed by birds.
Lenny Leonard - Decapitated by Carl with a sword.
Tracy Ullman Show Simpsons - Corpses shown underground.
Godzilla - Skeleton shown underground.
Fairy Waylon Smithers - Eaten by Pale Man Mr. Burns.
Montgomery Burns, Superintendent Chalmers, Agnes Skinner, Ms. Hoover, Moe Szyslak, Principal Skinner, Barney Gumble, Reverend Lovejoy, Helen Lovejoy, Kirk Van Houten, Luann Van Houten, Cookie Kwan, Squeeky Teen, Bumblee Man, Duffman, Disco Stu, Krusty, Sideshow Mel, Apu, Cletus, Groundskeeper Willie, Nick Riviera, and Julius Hibbert - Possibly killed by Frankenstein, Dracula, the Wolfman, the Mummy, the Gill-Man, the Bride of Frankenstein, the Metaluna Mutant, and the Invisible Man.
Milhouse Van Houten - Eaten by a giant fish.
Homer Simpson - Ran over by Maggie, but revived as a zombie from The Devil's Backbone.
Fairies - Disintegrated by the TV.
Mr. Burns - Turned into a roast vulture by the Fat In the Hat.
Waylon Smithers - Burned.
Moe Syzslak - Skinned by the Fat In the Hat.
Patty and Selma - Killed by the Fat In the Hat.
Ralph Wiggum - Impaled on spears.
Krusty Bull - Decapitated by Sideshow Bob.
The Fat In the Hat - Stabbed by Maggie and made into a carpet.
Jimbo Jones, Kearney Zzyzwicz, and Dolph Starbeam - Eaten by a lion.
Kang and Kodos - Suffocated by Mr. Burnstrum.
Mr. Burnstrum - Hung by the remaining freaks.
Homer Simpson, Babe Ruth, and Stalin - Died of an unknown cause.
Jennifer Lawrence, Warren Beatty, Clint Eastwood, George Clooney, Prince, Taylor Swift, Sean Penn, Bruce Springsteen, Helen Mirren, Morgan Freeman, James Franco, Kanye West, and Leonardo DiCaprio - Torn apart by Kang and Kodos and made into the Treehouse of Horror XXV logo.
John Travolta - Blasted in the head by Kang and Kodos.
Jimbo Jones - Decapitated by Beezle-Bart.
Homer Simpson - Cut apart by Beezle-Bart.
Sideshow Mel - Beaten to death by Homer.
Moe Syzslak - Beaten to death by Homer.
Marge Simpson - Commit suicide while washing the oven.
Homer Simpson - Bludgeoned by the Tracy Ulman Show Homer ghost with a toaster.
Lisa Simpson - Jumped out a window and turned into a ghost.
Bart Simpson - Suffocated by Lisa's ghost with his own slingshot and turned into a ghost.
Maggie Simpson - Died of an unknown cause and turned into a ghost, it is possible Groundskeeper Willie murdered her.
Gerald Samson - Slaughtered by Maggie's ghost and turned into a ghost.
Marvin Monroe - Died of an unknown cause.
Snowball V - Slaughtered by the ghosts.
Santa's Little Helper - Slaughtered by the ghosts.
Sideshow Bob, Kang, and Leprechaun - Decapitated by Maggie.
Couch - Bludgeoned by Homer with a rock.
Tortoises - Crushed into juice by Apu.
Ralph Wiggum - Exploded.
Peta and Pita - Killed by Homish.
Gerald Samson - Killed by his shotgun's recoil.
Wendell Borton - Killed by Nelson.
Ned Flanders - Decapitated by Barney with the Plow King.
Nelson Muntz - Shot in the back by Milhouse.
Mr. Burns - Either beaten to death by the Springfieldians or froze to death.
Springfieldians - Froze to death.
Janey Powell - Shredded by Rachel with Flanders' lawnmower.
Sherri and Terri Mackleberry - Crushed by Rachel with a tombstone.
Ms. Mancuso-Gluckman - Head crushed by Rachel with a painting.
Deer and Buddha - Ran over by Lisa.
Milhouse Van Houten - Suffocated by Rachel with a plastic bag.
Snowball V - Stabbed in the chest and thrown into a trash can by Rachel.
Sergeant Sausage - Blown up in a microwave by Rachel and later eaten by Homer.
Rachel - Turned into her mom married to a dentist by Lisa, dissolving her.
Dolph, Jimbo, and Kearney - Killed by Moe.
Carl Carlson - Electrocuted.
Dewey Largo, Gary Chalmers, Selma Bouvier, Patty Bouvier, Disco Stu, Nelson Muntz, Mrs. Muntz, Melvin Van Horne Rainer Wolfcastle, Agnes Skinner, Seymour Skinner, Apu Nahasapeemapetilon, Manjula Nahasapeemapetilon, Cletus Spuckler, Brandine Spuckler, Luann Van Houten, Blue-Haired Lawyer, Helen Lovejoy, Julius Hibbert, Bernice Hibbert, Dr. Hibbert's Second Daughter, Roy Snyder, Legs, Frankie the Squealer, Eleanor Abernathy, Lindsey Naegle, Horatio McCallister, Comic Book Guy, Drederick Tatum, Jasper Beardly, Roger Meyers, Jr., Charlie (SNPP), Elizabeth Hoover, and other members of the mob - Killed by Moe, Bart, Groundskeeper Willie, Gil, and Barney.
Moe Syzslak, Groundskeeper Willie, Gil Gunderson, and Barney Gumble - Killed by the remaining mob members.
Lenny Leonard, Carl Carlson, Disco Stu, Raphael, Comic Book Guy, Marge Simpson, Bart Simpson, Homer Simpson, Lisa Simpson, Otto Mann, Clancy Wiggum, Julius Hibbert, and other residents of Springfield - Bodies snatched.
Plant Clancy Wiggum - Shot by Lou.
Ned Flanders - Drained by the body snatchers.
Gary Chalmers - Killed by Groundskeeper Willie.
Milhouse Van Houten, Groundskeeper Willie, and Maggie Simpson - Bodies snatched.
Lou - Strangled by the body snatcher plant.
Groundskeeper Willie - Killed by Lisa with an axe.
Nelson Muntz - Impaled on a forklift by Lisa.
Waylon Smithers Jr. - Strangled by a dinosaur's DNA head.
Hans Moleman - Crushed by a dinosaur's foot.
Seymour Skinner - Arms eaten by Ludodactylus Agnes.
Kirk Van Houten - Head ripped off by the mutant dinosaur Jasper.
Professor Frink - Beaten to death by his other creators.