Kimitsu is a city located in Chiba Prefecture, Japan. As of 30 November 2020, the city had an estimated population of 83,058 in 39,138 households and a population density of 260 persons per km2. The total area of the city is 318.83 km2 (123.10 sq mi).

Chiba Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Chiba Prefecture has a population of 6,278,060 and has a geographic area of 5,157 km2 (1,991 sq mi). Chiba Prefecture borders Ibaraki Prefecture to the north, Saitama Prefecture to the northwest, and Tokyo to the west.