|Location||Shinchō, Ōnishi-chō, Imabari, Ehime
|Operated by||JR Shikoku|
Ōnishi Station has two tracks serving two side platforms.
Ōnishi Station opened on December 1, 1924, as Iyo-Ōi Station (伊予大井駅 Iyo-Ōi-eki?) after its location in the village of Ōi. In March 1955, Ōi Village was incorporated into the town of Ōnishi, and on October 1, 1959, this station was renamed to Ōnishi Station.
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