Higashikagawa is a city located in Kagawa Prefecture, Japan. As of 30 September 2022, the city had an estimated population of 28,627 in 13689 households and a population density of and a population density of 970 persons per km2. The total area of the city is 152.83 square kilometres (59.01 sq mi).

Hiketa Castle was a Sengoku period Japanese castle located in what is now part of the city of Higashikagawa, Kagawa Prefecture, Japan. Its ruins have been protected by the central government as a National Historic Site since 2020.