Ōnojō is a city located in the Fukuoka Prefecture of Japan. It serves as a residential and urban area within the region, characterized by its specific geographic boundaries and local population.
As of March 31, 2024, the city had an estimated population of 102,818 people living in 46,689 households. The total land area of Ōnojō is 26.89 square kilometers (approximately 10.38 square miles), resulting in a population density of 3,800 persons per square kilometer.