International Union of Radio Science
| Abbreviation | URSI | 
|---|---|
| Formation | 1919 | 
| Type | INGO | 
| Region served  | Worldwide | 
| Official language  | English, French | 
| President | Ari Sihvola (Finland) | 
| Parent organization | International Council for Science | 
| Website | www | 
The International Union of Radio Science (abbreviated URSI, after its French name, French: Union radio-scientifique internationale) is one of 26 international scientific unions affiliated to the International Council for Science (ICSU).