Doi (土居町, Doi-chō) was a town located in Uma District, Ehime Prefecture, Shikoku, Japan.

As of 2003, the town had an estimated population of 17,387 and a density of 200.59 persons per km². Its total area was 86.68 km².

On April 1, 2004, Doi along with the village of Shingū (also from Uma District), and the old cities of Iyomishima and Kawanoe, was merged to create the city of Shikokuchūō.^[1][2]