Minamiaizu (南会津町, Minamiaizu-machi) is a town located in Fukushima Prefecture, Japan.

Minamiaizu has a Humid continental climate (Köppen Dfa) characterized by warm summers and cold winters with heavy snowfall.

Per Japanese census data,[7] the population of Minamiaizu peaked I the 1950s and has declined steadily over the past 60 years.

After the Meiji Restoration, it was organized as part of Minamiaizu District in Fukushima Prefecture.

The town has two public high schools operated by the Fukushima Prefectural Board of Education.