Miyakonojō (都城市, Miyakonojō-shi) is a city in Miyazaki Prefecture, Japan. The city was founded on April 1, 1924. As of June 1, 2019, the city has an estimated population of 161,137, with 70,549 households and a population density of 247 per km2. The total area is 653.36 km2 making it the largest city in the prefecture in terms of area.