The BBC World Service is an international broadcaster owned and operated by the BBC. It is the world's largest external broadcaster in terms of reception area, language selection and audience reach. It broadcasts radio news, speech and discussions in more than 40 languages to many parts of the world on analogue and digital shortwave platforms, internet streaming, podcasting, satellite, DAB, FM and MW relays. In 2015, the World Service reached an average of 210 million people a week (via TV, radio and online). In November 2016, the BBC announced that it would start broadcasting in additional languages including Amharic and Igbo, in its biggest expansion since the 1940s.

BBC World Service English maintains eight regional feeds with several programme variations, covering, respectively, East and South Africa; West and Central Africa; Europe and Middle East; the Americas and Caribbean; East Asia; South Asia; Australasia; and the United Kingdom. There are also two separate online-only streams with one being more news-oriented, known as News Internet. The service broadcasts 24 hours a day.

The World Service claims that its aim is to be "the world's best-known and most-respected voice in international broadcasting", while retaining a "balanced British view" of international developments. Former director Peter Horrocks visualised the organisation as fighting an "information war" of soft power against Russian and Chinese international state media, including RT. As such, the BBC has been banned in both Russia and China, the former following its 2022 invasion of Ukraine and the latter for having "violated regulations that news bulletins should be 'truthful and fair".

The director of the BBC World Service is Liliane Landor; the controller of the BBC World Service in English is Jon Zilkha.