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This is a timeline of incidents in 1974 that have been labelled as "terrorism" and are not believed to have been carried out by a government or its forces (see state terrorism and state-sponsored terrorism).
- United Kingdom, January 20: Two IRA volunteers hijack a helicopter from Donegal in the Republic of Ireland and use it to drop bombs on a British Barracks in Strabane, Northern Ireland.
- Singapore, January 31: Laju incident: JRA–PFLP attack on a Shell facility in Singapore and the simultaneous seizure of the Japanese embassy in Kuwait.
- United Kingdom, February 4: Twelve people (nine soldiers and three civilians) are killed by the IRA in the M62 Coach Bombing.
- Israel, April 11: Kiryat Shmona massacre at an apartment building by the Popular Front for the Liberation of Palestine members, killing 18 people, nine of whom were children.
- Israel, May 15: Ma'alot massacre at the Ma'alot High School in Northern Israel by Popular Front for the Liberation of Palestine members: 26 of the hostages were killed, 66 wounded.
- Ireland, May 17: Ulster Volunteer Force detonate three car bombs in Dublin and one in Monaghan; 35 dead – killing 35 civilians, the deadliest toll of any one day in Ireland's 'Troubles'.
- Italy, May 28: Eight people are killed and at least 90 wounded when a bomb placed in a rubbish bin explodes in the Piazza della Loggia bombing.
- Italy, June 17: A group of terrorists from the Red Brigades attack an office of Italian Social Movement in Padua, Italy, killing two people.
- United States, June 17: The Weather Underground Organization planted a bomb in the lobby to protest Gulf Oil's actions in Angola, Vietnam, and elsewhere.
- United Kingdom, June 17: The IRA plant a bomb which explodes at the Houses of Parliament in London, causing extensive damage and injuring eleven people.
- Italy, August 4: Italicus Express train between Roma and Brennero explodes, killing twelve and injuring 44. Attributed to fascist group Ordine nero.
- Japan, August 30: Powerful bomb explodes at the Mitsubishi Heavy Industries headquarters in Marunouchi, Tokyo. Eight killed, 378 injured. Eight left-wing activists are arrested May 19, 1975 by Japanese authorities.
- United States, September 8: TWA Flight 841: Bomb kills 88 on jetliner. Attributed to Abu Nidal and his terrorist organization.
- Spain, September 13: Basque group ETA bombs the "Rolando" cafeteria in Madrid and kills twelve people.
- United Kingdom, October 5: Guildford pub bombing by the IRA leaves four off-duty soldiers and a civilian dead and 44 injured.
- United Kingdom, October 22: A bomb planted by the Provisional IRA explodes in London, injuring three people.
- United Kingdom, November 7: Woolwich, London pub bombing see Wiki -article Kings Arms, Woolwich
- United Kingdom, November 17: Three bombs exploded in three cities, Northampton, Birmingham and Coventry, that caused the death of one person. 
- United Kingdom, November 21: Birmingham pub bombing by the IRA kills 21 people, injures 182.
- United States, December 11: A bomb set off by the Puerto Rican nationalist group FALN in East Harlem, New York, permanently disables a police officer. The officer lost an eye as a result of this act.