J
- Jason Mraz Sings "I'm Yours" with sesame street friends about going outside.
- Hugh Jackman appears with Elmo and teaches the word "concentration"
- Mahalia Jackson
- Bo Jackson
- Gordon Jackson
- Jesse Jackson, one segment: Civil rights activist Jackson recited the free verse poem "I Am - Somebody" to numerous children and adult gathered around him on 123 Sesame Street.
- Michael Jackson
- Allison Janney
- Wyclef Jean
- Ken Jennings, one segment: Appearing in 2005 for a Healthy Moments segment, Jennings won a date with a pineapple after playing a game with Grover.
- Peter Jennings
- Michael Jeter
- The New York Jets, represented by Chad Pennington, Laveranues Coles, Ben Graham, and head coach Eric Mangini (episode 4147)
- Billy Joel sings with Marlee Matlin
- Arte Johnson
- James Earl Jones
- Norah Jones, sings with Elmo about her friend Y not meeting her. Sings song "Don't know why, Y didn't come"
- Shirley Jones
- Jughead Jones
- Johnny Cash, sings to Oscar the Grouch,Nasty Dan and sings to Biff, Five feet rising
Read more about this topic: List Of Guest Stars On Sesame Street