5700

5700 may refer to:

In general

 * A.D. 5700, a year in the 6th millennium CE
 * 5700 BC, a year in the 6th millennium BCE
 * 5700, a number in the 5000 (number) range

Rail

 * GWR 5700 Class, a pannier tank steam locomotive train class
 * Hanshin 5700 series, an electrical multiple unit train series
 * Meitetsu 5700 series, an electric multiple unit train series
 * Tobu 5700 series, a train type from Tobu Railway

Other uses

 * 5700 Homerus, an asteroid
 * Nokia 5700 XpressMusic, a smartphone