西会津町（日语：西会津町／にしあいづまち）是位于福岛县耶麻郡的一个人口约8000人的町，位于福岛县西北部。

Nishiaizu(西会津町,Nishiaizu-machi) is a town located in Yama District, Fukushima Prefecture, in northern Honshū, Japan. As of September 2014, the town had an estimated population of 6,695 and a population density of 22.5 persons per km². Approximately 66% of the population is over the age of 65. The total area was 298.13 km². About 86 percent of the total area is composed of mountains and forests.