Iwaki (岩城町; -machi) was a town located in Yuri District, Akita, Japan.
On March 22, 2005 the city of Honjō and the towns of Chōkai, Higashiyuri, Iwaki, Nishime, Ōuchi, Yashima and Yuri, all from Yuri District, merged to form the new city of Yurihonjō.
In 2003, the town had an estimated population of 6,413 and a density of 59.32 persons per km². The total area was 108.10 km².