Futagawa-juku (二川宿 Futagawa-juku?) was the thirty-third of the fifty-three stations of the Tōkaidō. It is located in what is now the city of Toyohashi, Aichi Prefecture, Japan. It was the eastern most post station in Mikawa Province.
Futagawa-juku was established in 1601 when two villages, Futagawa (二川村 Futagawa-mura) and Ōiwa (大岩村 Ōiwa-mura), in Mikawa Province's Atsumi District were directed with caring for travelers. However, as the towns were rather small and were separated by 1.3 km, the original setup did not last long. In 1644, the Tokugawa shogunate moved the village of Futagawa further to the west and the village of Ōiwa further to the east, before reestablishing the post station in the Futagawa's new location. An ai no shuku was built in Ōiwa.
Futagawa-juku was located approximately 283 kilometres (176 mi) from Edo's Nihonbashi, the start of the Tōkaidō. Furthermore, it was 5.8 kilometres (3.6 mi) from Shirasuka-juku to the east and 6.1 kilometres (3.8 mi) from Yoshida-juku to the west. Futagawa-juku itself stretched for about 1.3 kilometres (0.81 mi) along the road and held one honjin, one waki-honjin, and about 30 hatago. The honjin was destroyed many times by fire, but was always rebuilt. The honjin that existed after the Meiji period was rebuilt in 1988 and became an archives museum.