Shiroi is a city located in Chiba Prefecture, Japan. As of 1 November 2020, the city had an estimated population of 63,190 in 26,204 households and a population density of 1800 persons per km². The total area of the city is 35.48 square kilometres (13.70 sq mi). The name of the city comes from the word for "white" in Japanese, 白い。