Bovidae is a family of hoofed ruminant mammals in the order Artiodactyla. A member of this family is called a bovid. They are widespread throughout Africa, Asia, Europe, and North America, and are found in a variety of biomes, most typically forest, savanna, shrubland, and grassland. Bovids range in size from the 38 cm (15 in) long royal antelope to the 3.3 m (11 ft) long gaur, which can reach 1,500 kg (3,300 lb) in weight.^[1] Over a billion each of domesticated sheep, cattle, and goats, and over 200 million domesticated water buffalo, 14 million domestic yak, and 300,000 domesticated gayal are used in farming worldwide. Many wild species do not have population estimates, though the impala, springbok, and harnessed bushbuck have population sizes of over one million, while several species of bovid are considered endangered or critically endangered with populations as low as 25. One species, the scimitar oryx, was once extinct in the wild, though populations are now recovering. The bluebuck went extinct in the last 200 years, and the aurochs went extinct 400 years ago. A third extinct species, the red gazelle, potentially never existed,^[2] and the kouprey is potentially extinct, with no sightings since 1969.^[3]

The 146 extant species of Bovidae are split into 53 genera within 9 subfamilies: Aepycerotinae, or the impala; Alcelaphinae, containing the bontebok, hartebeest, wildebeest, and relatives; Antilopinae, containing several antelope, gazelles, and relatives; Bovinae, containing cattle, buffalos, bison, and other antelopes; Caprinae, containing goats, sheep, ibex, serows and relatives; Cephalophinae, or duikers; Hippotraginae, containing the addax, oryx, and relatives; Nesotraginae, or dwarf antelopes; and Reduncinae, or reedbuck and kob antelopes. Extinct species have also been placed into these subfamilies, as well as the extinct Hypsodontinae, Oiocerinae, and Tethytraginae subfamilies. Over one hundred extinct Bovidae species have been discovered, though due to ongoing research and discoveries the exact number and categorization is not fixed.^[4]

Conservation status codes listed follow the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Range maps are provided wherever possible; if a range map is not available, a description of the bovid's range is provided. Ranges are based on the IUCN Red List for that species unless otherwise noted. All extinct species or subspecies listed alongside extant species went extinct after 1500 CE, and are indicated by a dagger symbol "†".

The family Bovidae consists of 146 extant species belonging to 53 genera in 9 subfamilies and divided into hundreds of extant subspecies. This does not include hybrid species or extinct prehistoric species. Additionally, the bluebuck went extinct in the last 200 years, and the aurochs went extinct 400 years ago.

The following classification is based on the taxonomy described by Mammal Species of the World (2005), with augmentation by generally accepted proposals made since using molecular phylogenetic analysis.