八高線
Komagawa Station is served by the Hachikō Line for and , and the Kawagoe Line for . The station is located 31.1 kilometers from the terminus of the Hachikō Line at Hachiōji and 30.6 kilometers from the terminus of the Kawagoe Line at . The Hachikō Line is divided here into the electrified southern section to Hachiōji and the non-electrified northern section to . Many Kawagoe Line trains from Kawagoe continue to Hachiōji. The station is also served by trains to and from via the Chūō Line in the morning and evening peak periods.