田澤湖線
Ōmagari Station is served by the Ōu Main Line, Tazawako Line and Akita Shinkansen. It is located 240.7 km from the terminus of the Ōu Main Line at Fukushima Station and is 75.6 kilometers from the intermediate terminus of the Akita Shinkansen at Morioka Station. The station is also a terminal station for the Tazawako Line, and is 76.6 kilometers from the opposing terminal at Morioka Station.