| population | |
| Beppu Shi | 121865 |
| Bungo-ono Shi | 39191 |
| Bungo-takada Shi | 23685 |
| Hayami-gun | |
| Higashikunisaki-gun | |
| Hita Shi | 70274 |
| population | |
| Kitsuki Shi | 31182 |
| Kunisaki-shi | 32781 |
| Kusu-gun | |
| Nakatsu Shi | 85650 |
| Oita-shi | 478794 |
| Saiki Shi | 77158 |
| population | |
| Taketa Shi | 24239 |
| Tsukumi-shi | 19700 |
| Usa Shi | 59485 |
| Usuki Shi | 41486 |
| Yufu-shi | 35836 |
 | Oita Airport | ~ 42.03 km |
| Kumamoto Airport | ~ 67.28 km |
| Kitakyushu Airport | ~ 80.87 km |
| Yamaguchi Ube Airport | ~ 82.54 km |
| Fukuoka Airport | ~ 100.85 km |
| Saga Airport | ~ 105.45 km |
| Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni | ~ 129.48 km |
| Matsuyama Airport | ~ 136.62 km |
| JMSDF Omura Air Base | ~ 142.93 km |
