Seventeen is a young women's magazine targeted at the 12 to 24 age group. It was first published in 1944 and is today considered by many to be the most popular magazine for teenage girls although it faces growing competition.

Its content includes fashion, celebrities, lifestyle advice and sex. Its tone is light and positive, and is sometimes considered focused on white teens, although the editors are believed to be consciously broadening the content. The article length is kept deliberately brief, high quality photographs emphasize regular celebrity and clothing themes and it is well supported by advertising keen to reach the big-spending demographic of young women.

Founded by Walter Annenberg, the newspaper publisher, it remained in his control for many decades through Triangle Publications until he sold the group to Rupert Murdoch. The magazine was sold in 1991 during Murdoch's debt crisis to the KKR controlled Primedia company. The poor performance of Primedia, prompted the sale of Seventeen magazine to The Hearst Corporation, one of the world's biggest media conglomerates founded by William Randolph Hearst for $182.4 million.