Dear Boys (stylized in all caps) is a Japanese sports manga series written and illustrated by Hiroki Yagami. It was serialized in Kodansha's shōnen manga magazine Monthly Shōnen Magazine from June 1989 to January 1997, with its chapters collected in 23 tankōbon volumes. The story concerns the progress of the Mizuho High School basketball team as it attempts to win the prefectural championship. It also deals with the relationship between the players on the team, especially the two main characters Kazuhiko Aikawa and Takumi Fujiwara.

Dear Boys has spawned other manga series, also published in Monthly Shōnen Magazine: Dear Boys The Early Days (1997); Dear Boys Act II (1997–2008); Dear Boys Act 3 (2008–2015); Dear Boys Over Time (2016–2017); and Dear Boys Act 4 (2018–present).

A 26-episode anime television series adaptation of the original series, produced by OB Planning and animated by A.C.G.T, was broadcast on TV Tokyo from April to September 2003. In North America, the series was licensed by Bandai Entertainment and released under the title Hoop Days.

By March 2019, the overall Dear Boys manga series has sold over 45 million copies, making it one of the best-selling manga series of all time. In 2007, Dear Boys Act II won the 31st Kodansha Manga Award in the shōnen category.