2400 series may refer to:
Train types
CTA 2400 series electric multiple unit formerly operating for the Chicago Transit Authority Keihan 2400 series electric multiple unit operating for Keihan Electric Railway Kintetsu 2400 series electric multiple unit operating for Kintetsu Railway since 1966 Odakyu 2400 series electric multiple unit formerly operating for Odakyu Electric Railway from 1960 to 1989