Modern Tagata District was established in the July 22, 1878 cadastral reforms initiated by the Meiji government with one town (Nirayama) and 61 villages.
The village of Toi was elevated to town status on April 1, 1938, followed by Ōhito on December 10, 1940.
On November 1, 1960, the villages of Nakakarino and Kamikarino merged to form the town of Amagiyugashima.
On April 1, 2004, the towns of Shuzenji, Amagiyugashima, Nakaizu, and Toi merged to form the city of Izu.
This was followed by the merger of the towns of Nirayama, Izunagaoka, and Ōhito to form the city of Izunokuni on April 1, 2005.