Aomori Prefecture (青森県, Aomori-ken^?) is a prefecture of Japan located in the Tōhoku Region. The capital is the city of Aomori.

Until the Meiji Restoration, the area of Aomori prefecture was known as Mutsu Province.

The prefecture came into existence in 1871. Aomori Town was established in 1889. The town was incorporated as a city in 1898 with a population of 28,000. On May 3, 1910 a fire broke out in the Yasukata district. Fanned by strong winds, the fire quickly devastated the whole city. The conflagration claimed 26 lives and injured a further 160 residents. It destroyed 5,246 houses and burnt 19 storage sheds and 157 warehouses. At 10:30 p.m. on July 28, 1945 a squadron of American B29 bombers bombed over 90% of the city.

Radio Aomori (RAB) made its first broadcast in 1951. Four years later, the first fish auctions were held. 1958 saw the completion of the Municipal Fish Market as well as the opening of the Citizen's Hospital. In the same year, the Tsugaru Line established a rail connection with Minmaya Village at the tip of the peninsula.