Natural World is a strand of British wildlife documentary programmes broadcast on BBC Two and BBC Two HD and regarded by the BBC as its flagship natural history series. It is the longest-running documentary in its genre on British television, with nearly 500 episodes broadcast since its inception in 1983. Natural World programmes are typically one-off films that take an in-depth look at particular natural history events, stories or subjects from around the globe.

Natural World was produced by the BBC Natural History Unit in Bristol under the stewardship of the series editor, who was responsible for commissioning or acquiring content. Programmes are a mixture of in-house productions, collaborative productions with other broadcasters or acquisitions from independent producers. There was 10 programmes broadcast each year, of which approximately half are produced in-house. The series has close ties with the US series Nature, broadcast by PBS.