Tajiri (田尻町 Tajiri-chō) was a town located in Tōda District, Miyagi, Japan.
On March 31, 2006, Tajiri merged with the towns of Iwadeyama and Naruko, both from Tamatsukuri District, the towns of Kashimadai, Matsuyama and Sanbongi, all from Shida District, and the city of Furukawa to create the new city of Ōsaki. Tamatsukuri District and Shida District were dissolved as a result of this merger.
In 2003, the town had an estimated population of 13,023 and a population density of 198.55 persons per km². The total area was 65.59 km²;. The primary industry was rice farming. There was also a chemical plant.