Season one of Beverly Hills, 90210, an American teen drama television series, began airing on October 4, 1990 on Fox television network. The season concluded on May 9, 1991 after 22 episodes. The season follows a group of friends during their sophomore year in high school as they deal with everyday teenage issues such as relationships, teenage drinking, cancer scares, dysfunctional families, sex, shoplifting, learning disabilities, date rape, cheating, racism, rumors, AIDS and divorce.

The first season was aired Thursdays at 9/8c in the United States averaging 14.2 million viewers a week. The season was released on DVD as a six disc boxed set under the title of Beverly Hills, 90210: The Complete First Season in 2006 by Paramount Home Entertainment.