Jazz Jennings (born October 6, 2000) is an American teenage trans woman, YouTube celebrity, spokesmodel and LGBTQ rights activist. She came to wide national attention in 2007 on "'I'm a Girl' – Understanding Transgender Children" an interview with Barbara Walters on ABC News' 20/20. Her parents noted that Jazz was clear on being female as soon as she could speak. Other national interviews and appearances followed.

She hosts a series of videos about her life, titled "I Am Jazz", on YouTube, making her one of the youngest ever trans women to speak out on issues publicly. Christine Connelly, a member of the board of Boston Alliance of GLBT Youth stated, "She was the first young person who picked up the national spotlight, went on TV and was able to articulate her perspective and point of view with such innocence."

Jazz co-wrote "I Am Jazz", a children's biographical picture book about her life. Jazz is also noteworthy because her family fully supports her, which is rare but becoming more common as LGBTQ acceptance increases. She has agreed to star in a 11-part reality show TLC TV series to air summer 2015 called "All That Jazz" about her life. CNN states the show will feature "the 14-year-old and her family dealing with typical teen drama through the lens of a transgender youth."