Yawatahama is a city located in of Ehime Prefecture, Japan. As of 31 August 2022, the city had an estimated population of 31,385 in 15,638 households and a population density of 240 persons per km2. The total area of the city is 132.68 square kilometres (51.23 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.