In 2020, by far the highest number of fatalities in terrorist attacks worldwide were killed by Taliban. In total, nearly 9,000 people lost their lives in attacks by the organization based in Afghanistan. Boko Haram, the group responsible for the second highest number of fatalities, killed close to 1,900 victims, followed by Al Shabaab with 880 fatalities. Taliban was also the organization that committed the highest number of attacks in 2020.
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National Consortium for the Study of Terrorism and Responses to Terrorism. (July 6, 2022). Number of fatalities due to terrorist attacks worldwide in 2020, by responsible terrorist group [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/
National Consortium for the Study of Terrorism and Responses to Terrorism. "Number of fatalities due to terrorist attacks worldwide in 2020, by responsible terrorist group." Chart. July 6, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/
National Consortium for the Study of Terrorism and Responses to Terrorism. (2022). Number of fatalities due to terrorist attacks worldwide in 2020, by responsible terrorist group. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/
National Consortium for the Study of Terrorism and Responses to Terrorism. "Number of Fatalities Due to Terrorist Attacks Worldwide in 2020, by Responsible Terrorist Group." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 6 Jul 2022, /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/
National Consortium for the Study of Terrorism and Responses to Terrorism, Number of fatalities due to terrorist attacks worldwide in 2020, by responsible terrorist group ÌÇÐÄÆƽâ°æ, /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/ (last visited July 21, 2026)
Number of fatalities due to terrorist attacks worldwide in 2020, by responsible terrorist group [Graph], National Consortium for the Study of Terrorism and Responses to Terrorism, July 6, 2022. [Online]. Available: /statistics/517683/ten-most-violent-terrorist-groups-2015-by-number-of-attacks/
