The South Hokkaido Railway Company (道南いさりび鉄道株式会社, Dōnan Isaribi Tetsudō Kabushikigaisha) is a third-sector railway company based in Hakodate, Hokkaido, Japan.

Ownership of the stock is shared in the following proportions:[1] The company took control of passenger operations on the Hokkaido Railway Company (JR Hokkaido) Esashi Line between Kikonai Station and Goryōkaku Station following the commencement of operations of the Hokkaido Shinkansen on 26 March 2016.

Track: ∥: Double track, ∨: Double track ends, ◇: Passing loop |: No passing loop As of 1 April 2016[update], the company operates a fleet of nine KiHa 40 series diesel multiple unit (DMU) trains formerly owned by JR Hokkaido.

[4] The company was established on July 21, 2005 as the Hokkaidō Dōnan Chiiki Heikō Zairaisen Junbi Kabushikigaisha (北海道道南地域並行在来線準備株式会社).

[5] Revenue service commenced in March 2016, in conjunction with the opening of the Hokkaido Shinkansen.