A gazelle is any of many antelope species in the genus Gazella, or formerly considered to belong to it. Six species are included in two genera, Eudorcas and Nanger, which were formerly considered subgenera. The genus Procapra has also been considered a subgenus of Gazella, and its members are also referred to as gazelles; however they are not dealt with in this article.

Gazelles are known as swift animals – some are able to run at bursts as high as 60 miles per hour (97 km/h), or run at a sustained speed of 30 miles per hour (48 km/h). Gazelles are mostly found in the deserts, grasslands and savannas of Africa, but they are also found in southwest and central Asia, and the Indian subcontinent. They tend to live in herds and will eat less coarse, easily digestible plants and leaves.

Gazelles are rather small antelopes, most standing 2–3.5 feet (61–110 cm) high at the shoulder, and are generally fawn colored.

The gazelle species are classified in the Gazella, Eudorcas and Nanger. The taxonomy of these genera is a confused one, and the classification of species and subspecies has been an unsettled issue. Currently, the genus Gazella is widely considered to contain about 13 species.^{[citation needed]} Four further species are extinct – the Red Gazelle, the Arabian Gazelle, the Queen of Sheba's Gazelle, and the Saudi Gazelle. Most surviving gazelle species are considered threatened to varying degrees. Closely related to the true gazelles are the Tibetan and Mongolian gazelles (species of the genus Procapra), the blackbuck of Asia, and the African impala and Springbok.