蓝住町是位于德岛县东北部，吉野川下游北岸的城镇。

在室町时代是阿波国守护细川氏、三好氏的根据地，并在此筑有胜瑞城。

1889年10月1日德岛县实施町村制，现在的辖区在当时分属板野郡蓝园村和住吉村，两村于1955年04月29日合并为蓝住町。

在1955年成立蓝住町时，全町人口有10,544人，但此后人口开始减少，到1965年时仅有9,726人，后来由于德岛市的发展，开始成为德岛市的通勤城市，人口便开始成长，1985年有22,619人、2000年时突破三万人，达到30,368人，现在是德岛县内人口最多的町。

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

As of 2003, the town has an estimated population of 31,623 and a density of 1,943.64 persons per km². The total area is 16.27 km².

The historically significant site of Shozui Castle Park can be found in the east of the town. Shozui Castle Park is the site of the ruins of Shozui Castle. This castle was the stronghold from which various historical lords such as Lord Hosokawa and Lord Miyoshi ruled over Awa Province, now known as modern day Tokushima Prefecture, during the Muromachi era (1336-1573).