Beverly Hills, 90210 (often referred to as 90210) is an American teen drama series created by Darren Star and produced by Aaron Spelling via his production company Spelling Television. The series ran for 10 seasons on Fox from October 4, 1990-May 17, 2000, and is the first of 6 series in the franchise. The series follows the lives of a group of friends living in Beverly Hills, California, as they transition from high school to college and into the adult world. "90210" refers to one of the city's five ZIP codes.

The initial premise of the show was based on the adjustment and culture shock that twins Brandon (Jason Priestley) and Brenda Walsh (Shannen Doherty) experienced when they and their parents, Jim (James Eckhouse) and Cindy (Carol Potter), moved from Minneapolis, Minnesota, to Beverly Hills, California. In addition to chronicling the characters' friendships and romantic relationships, the show addressed topical issues such as sex, date rape, homophobia, animal rights, alcoholism, drug abuse, domestic violence, eating disorders, racism (including antisemitism), teenage suicide, teenage pregnancy, and AIDS.

After poor ratings during its first season, the series gained popularity during the summer of 1991, when Fox aired a special "summer season" of the show while most other series were in reruns. Viewership increased dramatically, and 90210 became one of Fox's top shows when it returned that fall. The show became a global pop culture phenomenon with its cast members, particularly Jason Priestley and Luke Perry, who became teen idols; the series also made actresses Shannen Doherty and Jennie Garth household names in the United States. The show is credited with creating or popularizing the teen soap genre that many other successful television shows followed in the years to come.

The show had many cast changes; Jennie Garth, Tori Spelling, Brian Austin Green, and Ian Ziering were the only actors to appear during its entire run and appeared on the first episode of the spin-off Melrose Place. On February 27, 2019, it was announced that a six-episode reboot had been ordered by Fox and that the show would simply be titled BH90210. The revival premiered on Fox on August 7, 2019, and was cancelled on November 7, 2019.