The original 2013 question was posed as follows: "Do you think that one man was responsible for the assassination of President Kennedy, or do you think that others were involved in a conspiracy?"
According to the source, the wording of the question has been altered slightly over the years.
*In 2013. Sample sizes for previous years were not available.
Citation formats
Survey on the involvment of third parties in JFK assassination since 1963
This statistic shows the results of a survey among American adults conducted through the years from 1963 to 2013 on their opinion regarding the circumstances of US President John F. Kennedy's assassination in Dallas, Texas in 1963. They were asked if they believe that it was carried out by one man alone, or if they think others were involved in a conspiracy to assassinate JFK. In November 2013, 30 percent of respondents believed that the assassination was carried out by one man alone, while 61 percent thought that third parties were involved.
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Gallup. (November 15, 2013). Do you think that one man was responsible for the assassination of President John F. Kennedy, or do you think that others were involved? [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 25, 2026, from /statistics/281451/kennedy-assassination-people-involved-survey/
Gallup. "Do you think that one man was responsible for the assassination of President John F. Kennedy, or do you think that others were involved?." Chart. November 15, 2013. ÌÇÐÄÆÆ½â°æ. Accessed July 25, 2026. /statistics/281451/kennedy-assassination-people-involved-survey/
Gallup. (2013). Do you think that one man was responsible for the assassination of President John F. Kennedy, or do you think that others were involved?. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 25, 2026. /statistics/281451/kennedy-assassination-people-involved-survey/
Gallup. "Do You Think That One Man Was Responsible for The Assassination of President John F. Kennedy, or Do You Think That Others Were Involved?." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 15 Nov 2013, /statistics/281451/kennedy-assassination-people-involved-survey/
Gallup, Do you think that one man was responsible for the assassination of President John F. Kennedy, or do you think that others were involved? ÌÇÐÄÆÆ½â°æ, /statistics/281451/kennedy-assassination-people-involved-survey/ (last visited July 25, 2026)
Do you think that one man was responsible for the assassination of President John F. Kennedy, or do you think that others were involved? [Graph], Gallup, November 15, 2013. [Online]. Available: /statistics/281451/kennedy-assassination-people-involved-survey/