The nyala (Nyala angasii) is a Southern African antelope. It is a spiral-horned dense-forest antelope that is uncomfortable in open spaces and is most often seen at water holes. Nyalas live alone or in small family groups of up to 10 individuals.

The male stands up to 110 cm (3.5 feet), the female is up to 90 cm (3 feet) tall. The male has loosely spiraled horns and a long fringe on throat and underparts; the female has no horns and no noticeable fringe. The male is dark brown, white on the face and neck, with vertical white stripes on the body. The female is reddish brown with white vertical striping.

The rare mountain nyala (Tragelaphus buxtoni) is limited to central Ethiopia. While superficially similar to the lowland nyala, it is now considered more closely related to the kudu.

The name "nyala" is the Swahili name for this antelope, which itself comes from the Zulu "inyala". The Latin name comes from "tragos" (he-goat), "elaphos" (deer), and George French Angas of South Australia.

The nyala is the second taxon to branch off of the spiral-horned antelope family tree just after the lesser kudu. Fossil evidence suggests that the nyala has been a separate species since the end of the Miocene (5.8 million years ago). Genetic evidence suggests that the proto-nyala had some early hybridization with the proto-lesser kudu, but the two have remained separate long after this crossing.