Kogorō, Kogoro or Kogorou (written: 小五郎) is a masculine Japanese given name. Notable people with the name include:
(1894–1978), Japanese businessman (1854–1926), Japanese diplomat and ambassador
Fictional characters: , fictional amateur detective created by Edogawa Rampo , fictional private detective from the Japanese detective manga and anime series, Case Closed written and illustrated by Gosho Aoyama