Hattori (written: 服部) is a Japanese surname. Notable people with the surname include:
Akio Hattori, mathematician
Hattori–Stong theorem
Hattori Hanzō (disambiguation)
Hattori Hanzō
Hattori Kazutada (died 1595), Japanese samurai
Hattori Tomosada, Japanese samurai
Hattori Yūji (born 1960), sumo wrestler
Katsuhisa Hattori (born 1936), Japanese classical composer
Mitsuru Hattori, manga artist
Naoki Hattori (born 1966), Japanese racing driver and journalist
Shigeaki Hattori (born 1963), Japanese racing driver
Takushiro Hattori (1901–1960), Imperial Japanese Army officer
Toshihiro Hattori (born 1973), Japanese footballer
Yoshihiro Hattori (1975–1992)
Yoshio Hattori
Yukio Hattori (born 1945), Japanese television personality