Tōyo (東予市 Tōyo-shi) was a city located in Ehime, Japan.
On November 1, 2004 Tōyo, along with the towns of Komatsu and Tanbara, both from Shūsō District, was merged into the expanded city of Saijō and no longer exists as an independent municipality.
As of 2003, the city had an estimated population of 32,652 and the density of 441.90 persons per km². The total area was 73.89 km².
The city was founded on October 1, 1972.