Ipponmatsu (一本松町 Ipponmatsu-chō) was a town located in Minamiuwa District, Ehime, Japan.
On October 1, 2004 Ipponmatsu was merged with the towns of Jōhen, Mishō and Nishiumi, and the village of Uchiumi, all from Minamiuwa District, to form the new town of Ainan.
As of 2003, the town had an estimated population of 4,204 and a density of 58.15 persons per km². The total area was 72.29 km².