Akō is a city in southwestern Hyōgo Prefecture, Japan. It lies in the western part of the prefecture, facing the Seto Inland Sea.
As of 31 May 2022, the city had an estimated population of 45,747 living in 20,563 households, with a population density of 360 persons per square kilometre. Its total area is 126.85 square kilometres (48.98 square miles).