| population | |
| Amphoe Ban Chang | 63659 |
| Amphoe Ban Khai | 74347 |
| Amphoe Khao Chamao | 23928 |
| population | |
| Amphoe Klaeng | 135390 |
| Amphoe Mueang Rayong | 364544 |
| Amphoe Nikhom Phattana | 61447 |
| population | |
| Amphoe Pluak Daeng | 71531 |
| Amphoe Wang Chan | 26226 |
 | U-Tapao International Airport | ~ 49.49 km |
| Trat Airport | ~ 114.46 km |
| Suvarnabhumi Airport | ~ 120.02 km |
| Don Mueang International Airport | ~ 149.64 km |
| Hua Hin Airport | ~ 162.21 km |
 | Battambang Airport | ~ 196.22 km |
| Kamphaeng Saen Airport | ~ 216.28 km |
| Koh Kong Airport | ~ 217.44 km |
| Sa Pran Nak Airport | ~ 250.28 km |
