Settsu is a city located in Osaka Prefecture, Japan. As of 1 October 2022, the city had an estimated population of 87,143 in 40,825 households and a population density of 5700 persons per km2. The total area of the city is 76.49 square kilometres (29.53 sq mi). It is a suburban city of Osaka City and a part of the Kyoto-Osaka-Kobe metropolitan area.