Minamibōsō is a city situated in the Chiba Prefecture of Japan. It covers a total land area of 230.22 square kilometers (88.89 sq mi), which makes it the fifth largest city in the prefecture by size.
As of November 1, 2020, the city had an estimated population of 37,143 people living in 17,175 households. The area maintains a population density of approximately 160 persons per square kilometer.