"I Just Shot John Lennon" is a song from The Cranberries' album To the Faithful Departed. It is a narrative of the events of the night of December 8, 1980, the night that musician John Lennon was murdered by Mark David Chapman in front of The Dakota in New York City. It is one of many tributes to Lennon, and also one of many other songs to recall the events of the night. After the narrative, there is commentary: "What a sad, and sorry and sickening sight". The song is a murder ballad.
The title of the song comes from the words said by Chapman that evening. After being asked, "Do you know what you've done?" Chapman calmly replied, "Yes, I just shot John Lennon".
The Cranberries performed the song live on Late Night with Conan O'Brien in 1995. Another live-session of the song is available on their single "Salvation".