Waga (和賀郡, Waga-gun) is a rural district in Iwate Prefecture, in the Tōhoku region of northern Japan.
Parts of the cities of Kitakami, Hanamaki and the town of Kanegasaki were formerly within the district.
During the Edo period under the Tokugawa shogunate, the district was within Mutsu Province and was under the control of the Nanbu clan of Morioka Domain.
In 1869, following the Meiji restoration, Mutsu Province was divided, with the area of Waga District becoming part of Rikuchū Province, and from 1872, part of Iwate Prefecture.
[citation needed] In 1878, with the establishment of the municipalities, Waga District was administratively divided into 69 villages.