Rentarō, Rentaro or Rentarou (written: 連太郎 or 廉太郎) is a masculine Japanese given name. Notable people with the name include:

, Japanese actor , Japanese statesman and politician , Japanese classical pianist and composer , Japanese ryūkōka singer

Fictional Characters Rentarō Satomi from the light novel series Black Bullet Rentarō Aijō from the manga Kimi no koto ga Dai Dai Dai Dai Daisuki na 100-nin no Kanojo Rentaro Kagura From Kamen Rider Shinobi Kamen Rider Zi-O

See also 8877 Rentaro, main-belt asteroid