Jeffrey Adam Zucker (born April 9, 1965) is an American businessman and media executive. Zucker was the president of CNN Worldwide from 2013 to 2022. He oversaw CNN, CNN International, HLN, and CNN Digital. He was previously CEO of NBCUniversal.

Jeffrey Adam Zucker was born on April 9, 1965, into a Jewish family in Homestead, Florida, near Miami, on April 9, 1965. His father, Matthew Zucker, was a cardiologist, and his mother, Arline, was a school teacher.

He was a captain of the North Miami Senior High School tennis team, editor of the school paper, and a teenage freelance reporter ("stringer") for The Miami Herald. Zucker also was president of his sophomore, junior, and senior classes, running on the slogan "The little man with the big ideas." He graduated from North Miami Senior High School in 1982. Before college, he took part in Northwestern University's National High School Institute program for journalism. Zucker went on to Harvard University. He was president of the school newspaper, The Harvard Crimson, during his senior year. As such, he encouraged the Crimson's decades-old prank rivalry with the Harvard Lampoon, then headed by future NBC employee Conan O'Brien, which culminated in Zucker having O’Brien arrested. Zucker graduated from Harvard in 1986 with a Bachelor of Arts in American history.

When he was not admitted to Harvard Law School, he began working at NBC by accepting an internship at the 1988 Summer Olympics.

In 1989, he was a field producer for Today, and at 26 he became its executive producer in 1992. He introduced the program's trademark outdoor rock concert series and was in charge as Today moved to the "window on the world" Studio 1A in Rockefeller Plaza in 1994. He is credited with managing the show during its most successful years and launching it into its 16 years of ratings dominance.

In 2000, he was named NBC Entertainment's president. A 2004 BusinessWeek Profile stated that "During that time he oversaw NBC's entire entertainment schedule. He kept the network ahead of the pack by airing the gross out show Fear Factor, negotiating for the cast of the hit series Friends to take the series up to a tenth season, and signing Donald Trump for the reality show The Apprentice. He is credited with the idea to extend Friends episodes by 10 minutes and convinced the cast to extend their contracts by two years. The Friends era was one of the most profitable ever for NBC. The Zucker era produced a spike in operating earnings for NBC, from $532 million the year he took over to $870 million in 2003."

Zucker introduced Las Vegas, Law & Order: Criminal Intent, and Scrubs. He originated the idea of airing "Supersized" (longer than the standard 30-minute slot) episodes of NBC's comedies and aggressively programming in the summer months as cable networks began to draw away viewers with original programming from the network's rerun-filled summer slate. Bravo changed its programming direction towards reality television, while the newly acquired Spanish network Telemundo was positioned to be more competitive with leading network Univision.

In December 2003, Zucker became president of NBC's Entertainment, News & Cable Group as well.