John F. Kennedy (May 29, 1917 - November 22, 1963) was the president of the United States from 1961 until his assassination in 1963. He appeared in an advert for Duff Beer along with Richard Nixon. Homer watched him on TV when he was a boy. Grampa mistook him for a Nazi and had him beaten up when he overheard him say, "Ich bin ein Berliner." He also appeared in Lisa's dream. He also may have been the president alluded to by Steve in Secret Nuclear Defense Plan U.S. Govt. Film #1612 due to the monochrome display suggesting a time frame between the late 1940s and early 1960s, although the lack of a mention to a specific time frame for the film does not make this clear. Kennedy is voiced in exactly the same way as Joe Quimby.
- Episode – "Duffless"
- Episode – "Grampa vs. Sexual Inadequacy"
- Episode – "Simpson Tide"
- Episode – "Worst Episode Ever" (possible mention)
- Episode – "Little Girl in the Big Ten"
- "Treehouse of Horror XIX"