3100 series

3100 series or 3100 class train may refer to:

Japanese train types

 * Hakone Tozan 3100 series, an electric multiple unit train
 * Hankyu 3100 series, an electric multiple unit train
 * Keisei 3100 series, an electric multiple unit train
 * Meitetsu 3100 series, an electric multiple unit train included
 * Odakyu 3100 series NSE, an electric multiple unit train

Other

 * CP Class 3100
 * GWR 3100 Class
 * MRTC 3100 class, a light rail vehicle
 * Queensland Railways 3100/3200 class