| Radio Thailand World Service | |
| Country: | Thailand |
| Network Type: | Radio network |
| Available: | International |
| Owner: | National Broadcasting Services of Thailand |
| Launch Date: | 20 October 1938 |
| Website: | Radio Thailand World Service website |
Radio Thailand World Service is the official international broadcasting station of Thailand. It was launched on 20 October 1938 under callsign HSK-9. Owned by the National Broadcasting Services of Thailand, the station broadcasts in 10 languages: Thai, English, Chinese, Burmese, Lao, Khmer, Malay, German, Japanese and Vietnamese. RTWS is broadcast on the shortwave band using the relay transmitter tower of Voice of America in Ban Dung District, Udon Thani.