Mihara is a city located in Hiroshima Prefecture, Japan. As of 30 April 2023, the city had an estimated population of 88,591 in 43253 households and a population density of 190 persons per km2. The total area of the city is 258.14 square kilometres (99.67 sq mi).

Hiroshima Prefecture is a prefecture of Japan located in the Chūgoku region of Honshu. Hiroshima Prefecture has a population of 2,811,410 and has a geographic area of 8,479 km². Hiroshima Prefecture borders Okayama Prefecture to the east, Tottori Prefecture to the northeast, Shimane Prefecture to the north, and Yamaguchi Prefecture to the southwest.