Sōja is a city located in the Okayama Prefecture of Japan. It serves as a regional municipality within this prefecture, characterized by its specific geographic location and administrative boundaries.
As of March 31, 2023, the city had an estimated population of 69,428 residents. The total land area of Sōja is 211.90 square kilometres (approximately 81.82 square miles), resulting in a population density of 330 persons per square kilometre.