Seventeen or 17 may refer to:

• 17 (number)
• 17 BC, 17 AD, 1917, 2017, etc., the years
• 17 AH, the year 17 AH in the Islamic calendar

Seventeen is an American magazine for teenagers. It was the first teen magazine established in the United States. The magazine's reader base is 10-to-19-year-old females. It began as a publication geared towards inspiring teen girls to become model workers and citizens. Soon after its debut, Seventeen took a more fashion and romance-oriented approach in presenting its material while promoting self-confidence in young women. It was first published in September 1944 by Walter Annenberg's Triangle Publications.