• Laetus, Marcia, and one athlete – assassin of Roman emperor Commodus Planner: Laetus Assassins: Marcia and an unnamed athlete who strangled the emperor in his bath when Marcia's poison worked too slowly.
• (Name?) - assassin of Alejandro Gonzalez Malave
• (Name?) - assassin of Carthaginian general Hasdrubal
• (Talmadge Hayer (confessed and convicted) Norman 3X Butler & Thomas 15X Johnson (convicted)) - the three assassins of Malcolm X
• ("three black Africans and an Arab") – assassins of Zanzibar's leader sheik Abeid Karume[?]
• (a tank corps major) - assassin of Ngo Dinh Diem
• (Name?) - assassin of Polish ruler Waclaw III[?]
• (Name?) - assassin of Vlad Tepes
• (Name?) - assassin of the father of Vlad Tepes

A

• Mehmet Ali Agca - failed assassin of Pope John Paul II
• Frank Abbandando - Mafia hitman
• Saad Akbar[?], assassin of Liaquat Ali Khan[?], president of Pakistan
• Jacob Johan Anckarström[?] - assassin of King Gustav III of Sweden
• Yigal Amir[?] - assassin of the Prime Minister of Israel Yitzhak Rabin

B

• Byron De La Beckwith - assassin of US civil rights figure Medgar Evers
• John Bellingham[?] - assassin of British Prime Minister Spencer Perceval (May 11, 1811)
• John Wilkes Booth - assassin of the American President Abraham Lincoln
• Arthur Herman Bremer[?] – would-be assassin of George Wallace, governor of Alabama
• Brutus and associates - assassins of Julius Caesar

C

• Carlos the Jackal – terrorist, would-be assassin of Joseph Sieff[?]
• Sante Jeronimo Caserio - assassin of the French President Marie François Sadi Carnot
• Mark Chapman[?] - assassin of John Lennon
• Jacques Clément - assassin of King Henri III of France
• Charlotte Corday - assassin of Jean-Paul Marat
• Leon Czolgosz - assassin of the American President William McKinley

D

• Dingaan[?] and Mhlangana[?] - assassins of Shaka, the king of Zulus.

E

• Lydia Echevarria- alleged intelectual assassin of Luis Vigoreaux

F

• John Felton[?] – assassin of George Villiers, 1st Duke of Buckhingham[?]
• Lynette 'Squeaky' Fromme[?] – apparent would-be assassin of Gerald Ford

G

• Balthazar Gérards[?] – assassin of William I of Orange
• Naturam Godse - assassin of Mahatma Gandhi
• Volkert van der Graaf convicted assassin of Pim Fortuyn
• Charles J. Guiteau - assassin of the American President James Garfield

H

• Hashshashin - the original Afghan assassins.
• John Hinckley, Jr. - would-be assassin of Ronald Reagan.

I

J

• Jin Ke - failed assassin of the first Chinese emperor Qin Shi Huang Di

K

L

• Luigi Lucheni[?] - assassin of Elisabeth of Austria

M

• Ramon Mercader[?] - assassin of Leon Trotsky
• Sarah Jane Moore[?] – would-be assassin of Gerald Ford

N

• Ninja – assassins of medieval Japan

O

• Lee Harvey Oswald - assumed assassin of the American President John F. Kennedy

P

• Christer Pettersson - acquitted on the murder of the Prime Minister of Sweden Olof Palme
• Otto Planetta[?] and others - assassin of Austrian Chancellor Engelbert Dollfuss
• Lewis Powell[?] or Lewis Paine – would-be assassin of United States Secretary of State William Seward in 1865
• Gavrilo Princip - the Serbian nationalist who killed Franz Ferdinand, Archduke of Austria and hence triggered World War I

Q

R

• Ravaillac - fanatic assassin of Henry IV of France
• James Earl Ray - confessed to the shooting of Martin Luther King Jr
• Otto Rothstock[?] - assassin of Hugo Bettauer[?] (1925)
• Jack Ruby - assassin of Lee Harvey Oswald

S

• Yolanda Saldivar - convicted for the murder of Selena Quintanilla
• Eugen Schauman[?] - assassin of Nikolai Ivanovich Bobrikov[?]
• Yuan Shikai - alleged mastermind behind assassination of Sung Chiao-jen
• Miles Sindercombe[?] - leader of would-be assassins of Oliver Cromwell.
• Beant Singh[?] and Sukhwant Singh[?] - assassins of the Prime Minister of India Indira Gandhi
• Sivarasan[?] - Tamil Tigers member and mastermind of assassination of Indian Prime Minister Rajiv Gandhi
• Sirhan B. Sirhan - assassin of Robert F. Kennedy
• Phil Strauss[?] - Mafia hitman

T

• Soghomon Tehlirian[?] - assassin of Talaat Pasha[?]

U

V

• Raoul Villain[?] - assassin of Jean Jaures

W

• Carl Weiss[?] – assassin of Huey Long
• Dan White[?] – assassin of mayor of San Francisco George Moscone[?] and councilman Harvey Milk in 1978

X

Y

• Felix Yussupov, hard working assassin of Grigori Rasputin

Z

• Giuseppe Zangara, assassin of Anton Cermak, mayor of Chicago and would-be assassin of Franklin Delano Roosevelt.

See also:

• List of assassinated persons
• Conspiracy theory
• Terrorism