Aizumi (藍住町, Aizumi-chō) is a town located in Itano District, in northeastern Tokushima Prefecture, Japan.

Tokushima Prefecture Aizumi has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light snowfall.

During winter, the average monthly discharge is 50 mm throughout the season, with a touch of Seto Inland Sea-style climate being present.

The villages of Aizono (藍園村) and Sumiyoshi (住吉村) were established within Itano District, Tokushima with the creation of the modern municipalities' system on October 1, 1889.

Aizumi has a mayor-council form of government with a directly elected mayor and a unicameral town council of 16 members.

In terms of national politics, the town is part of Tokushima 2nd district of the lower house of the Diet of Japan.