Suigun Line
Mito Station is served by the JR East Jōban Line and Suigun Line, and also by the Kashima Rinkai Railway's Ōarai-Kashima Line. It is located 115.3 km from the official starting point of the Jōban Line at Nippori Station and is a terminus of the Suigun Line and of the Ōarai-Kashima Line.