Tsugaru clan
The area around Itayanagi was controlled by the Tsugaru clan of Hirosaki Domain during the Edo period, and was the location of a "daikansho". After the Meiji Restoration, it was formed into a village on April 1, 889 with the establishment of the modern municipalities system. It was elevated to town status on April 1, 1920. On March 10, 1955, it annexed the neighboring villages of Hataoka, Koami, and Arakawa.