| population | |
| Amphoe Fao Rai | 45472 |
| Amphoe Mueang Nong Khai | 131965 |
| Amphoe Pho Tak | 13431 |
| population | |
| Amphoe Phonphisai | 87241 |
| Amphoe Rattanawapi | 33729 |
| Amphoe Sa Khrai | 23147 |
| population | |
| Amphoe Sangkhom | 21440 |
| Amphoe Si Chiang Mai | 27745 |
| Amphoe Tha Bo | 74602 |
 | Wattay International Airport | ~ 33.07 km |
 | Udon Thani Airport | ~ 40.63 km |
| Udorn Air Base | ~ 41.15 km |
| Loei Airport | ~ 114.31 km |
| Khon Kaen Airport | ~ 142.75 km |
| Sakon Nakhon Airport | ~ 157.77 km |
| Xieng Khouang Airport | ~ 193.86 km |
| Sayaboury Airport | ~ 199.06 km |
| Phetchabun Airport | ~ 203.81 km |
