Kagawa (written: 香川, 加川 or 賀川) is a Japanese surname. Notable people with the surname include:
Emiko Kagawa (香川 恵美子), announcer, wife of So Taguchi
Julie Kagawa, American author
Kyōko Kagawa (香川 京子), actress
Masao Kagawa, karateka
Nobuyuki Kagawa (香川 伸行), baseball player
Shinji Kagawa (香川 真司), football player who plays for Borussia Dortmund
Ryo Kagawa (加川 良), folk singer
Teruyuki Kagawa (香川 照之), actor
Tetsuo Kagawa, astronomer
Toyohiko Kagawa (賀川 豊彦), pacifist and labor activist
Yuki Kagawa (香川 勇気, born 1992), Japanese footballer