Mitoyo, Kagawa

 is a city located in Kagawa Prefecture, Japan. , the city has an estimated population of 65,713 and a population density of 300 persons per km². The total area is 222.71 km².
The modern city of Mitoyo was established on January 1, 2006, from the merger of all seven towns from the former Mitoyo District: Mino, Nio, Saita, Takase, Takuma, Toyonaka and Yamamoto.
Tsushima Shrine, located in Mitoyo, is only accessible one day a year in early August.
Mitoyo City has a sister city relationship with Waupaca, Wisconsin.