Ōmihachiman is a city located in the Shiga Prefecture of Japan. It serves as a regional center within the prefecture, characterized by its specific geographical and demographic profile.
As of August 31, 2021, the city had an estimated population of 82,233 residents living in 34,747 households. The area covers a total of 76.97 square kilometres (29.72 sq mi), resulting in a population density of approximately 570 persons per square kilometre.