Jerome Allen Seinfeld (born April 29, 1954) is an American stand-up comedian, actor, writer, and producer. As a stand-up comedian, Seinfeld specializes in observational comedy. Seinfeld has received numerous accolades including a Primetime Emmy Award, a Golden Globe Awards, and three Screen Actors Guild Awards as well as nominations for four Grammy Awards. In 2004, Comedy Central named him the 12th-greatest stand-up comedian of all time. In 2017, Rolling Stone named him the 7th-greatest stand-up comedian of all time.

Seinfeld gained stardom playing a semi-fictionalized version of himself in the NBC sitcom Seinfeld (1989–1998), which he co-created and wrote with Larry David. Seinfeld earned a Golden Globe Award for Best Actor – Television Series Musical or Comedy in 1995. The show is one of the most acclaimed and popular sitcoms of all time. He has since created and produced the reality series The Marriage Ref (2010–2011), and created and hosted the web series Comedians in Cars Getting Coffee (2012–2019), the latter of which earned him three Webby Awards. He also co-produced, co-wrote, and starred in the DreamWorks animated film Bee Movie (2007) and the Netflix comedy Unfrosted (2024).

He has released four standup specials his first being Stand-Up Confidential (1987) followed by I'm Telling You for the Last Time (1998), Jerry Before Seinfeld (2017) and 23 Hours to Kill (2020). Seinfeld has also written three books starting with SeinLanguage (1993), followed by the children's book Halloween (2002), and the comedic compilation book Is This Anything? (2020). He is an avid fan of coffee and automobiles. He practices transcendental meditation. He is married to author and philanthropist Jessica Seinfeld, with whom he has three children.