Matsuyama is the capital city of Ehime Prefecture, on the island of Shikoku, in Japan and is also Shikoku's largest city. As of 1 October 2022, the city had an estimated population of 505,948 in 243,541 households and a population density of 1200 persons per km2. The total area of the city is 429.35 square kilometres (165.77 sq mi).

Ehime Prefecture is a prefecture of Japan located on the island of Shikoku. Ehime Prefecture has a population of 1,334,841 and has a geographic area of 5,676 km2. Ehime Prefecture borders Kagawa Prefecture to the northeast, Tokushima Prefecture to the east, and Kōchi Prefecture to the southeast.