[2] Per Japanese census data,[3] the population of Tsugaru has decreased steadily over the past 60 years.

Kizuki expanded by merging with the neighboring villages of Koshimizu, Shibata, Kawayoke, Shussei, Tateoka and part of Narusawa on March 30, 1955.

The city of Tsugaru was established on February 11, 2005, from the merger of the town of Kizukuri, and the villages of Inagaki, Kashiwa, Morita and Shariki (all from Nishitsugaru District).

Tsugaru has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 20 members.

In terms of national politics, the city is part of Aomori 3rd district of the lower house of the Diet of Japan.