The Ishinomaki Line (石巻線, Ishinomaki-sen) is a railway line in Miyagi Prefecture, Japan, operated by East Japan Railway Company (JR East).
It connects Kogota Station in Misato with Onagawa Station in Onagawa, acting as a spur line from the Tōhoku Main Line to the central coast of Miyagi Prefecture.
The Senpoku Light Railway opened a 762 mm (2 ft 6 in) gauge line from Kogota to Ishinomaki in 1912.
The Oshika Light Railway opened a 762 mm (2 ft 6 in) gauge horse-drawn tramway from Ishinomaki to Watanoha in 1915, and extended it to Onagawa in 1924.
[citation needed] In 1958, the line was extended 1.4 km (0.87 mi) to the Onagawa Port, but that extension closed in 1980.