Joshua Ian Schwartz (born August 6, 1976) is an American screenwriter and television producer. He is best known for creating and executive producing the Fox teen drama series The O.C. which ran for 4 seasons. Schwartz is also known for developing The CW's series Gossip Girl based on the book of the same name and for co-creating NBC's action-comedy-spy series, Chuck.

At 26, he became one of the youngest people in network history to create a series and run its day-to-day production when he ran The O.C.

Schwartz was born to a Jewish family in 1976 in Providence, Rhode Island, the son of Steve and Honey Schwartz. His parents were both toy inventors at Hasbro, working on the development of toys such as Transformers and My Little Pony, until they went on to start their own company. Schwartz grew up on the east side of Providence, Rhode Island with a younger brother, Danny, and a younger sister, Katie. Schwartz always had ambitions of being a writer since early childhood.

When Schwartz was seven years old, he won an essay-writing contest at Summer camp for a review of the recently released movie Gremlins; the opening line was "Spielberg has done it again" and stood out amongst the other submissions.

He attended Providence's private Wheeler School, a coeducational independent day school, for 11 years, graduating with the class of 1994.

In 1995, Schwartz attended film school to study screen and television writing at the University of Southern California (USC). He became a member of the Pi Kappa Alpha fraternity, as well as president of the chapter, and got to see what it's like "behind the gated communities and big mansions" of Southern California which would later provide fodder for his pilot The O.C.

While at USC, Schwartz tried out stand-up comedy at a talent show in front of five hundred people but was "disabused of [the] notion very quickly." In his sophomore year he wrote an autobiographical screenplay about his senior year in high school called Providence as a homework assignment for school. He entered his screenplay into a contest for the prestigious Nicholson Award in Screenwriting, the highest honor awarded to undergraduates, and won. However, the prize was later revoked; to be eligible he had to be in his junior year at the time. Schwartz says "I dropped it in a box – I was a sophomore. And I got a call over the summer saying I'd won, and I'd won five thousand dollars. I was like, 'This is awesome!' Then they called back, like, the next day and said you had to be a junior to enter and not a sophomore, so they were rescinding it. I was pretty pissed." With help from connections through his fraternity, he generated interest in Hollywood, and in 1997, Sony's TriStar Pictures bought his first screenplay in a bidding war for a deal guaranteeing $550,000 and worth up to $1 million while he was still a junior in college. It was never made.

Schwartz got an agent and subsequently wrote a TV pilot called Brookfield for ABC/Disney while he was still studying at USC. It was a boarding school drama about wealthy kids in New England and was his first TV pilot script; it sold only a few months after he had sold his first feature film script. Brookfield was produced starring Amy Smart and Eric Balfour but never aired. Schwartz then dropped out of USC to work full-time and wrote another pilot called Wall to Wall Records, a drama about working in a music store for Warner Bros. TV that was also produced but never aired.