The American badger, the only New World species, is usually found in open, dry country of western North America. Muscular, short-necked, and flat-bodied, it has a broad, flattened head and short legs and tail. The colour of the coat is grayish and grizzled, dark at the face and feet with a white stripe extending from the nose to the back. It is 23 cm (9 inches) tall and 42–76 cm long, excluding the 10–16-cm tail, and it weighs 4–12 kg (9–26 pounds). The American badger is a powerful animal that captures most of its prey by rapid digging. Generally solitary, it feeds mainly on rodents, particularly ground squirrels, pocket gophers, mice (mouse), and voles. Other prey include insects, reptiles, and eggs of ground-nesting birds. Mostly nocturnal, American badgers spend the day inside a burrow often dug the night before. Home ranges are from 1 to 10 square km (0.4 to 4 square miles), depending on habitat and food resources. During the winter they sleep underground for long periods. To survive this period of fasting, they accumulate large amounts of body fat during late summer and autumn. Mating occurs during this time, but implantation of the zygote is delayed. Thus, although the young (usually two or three) are born the following spring, true gestation is only six weeks.

The Eurasian badger (Meles meles) is omnivorous, consuming earthworms, insects, small mammals, birds and their eggs, and also fruits and nuts. It is grayish, with large black-and-white facial stripes. It is 30 cm tall and 56–81 cm long, excluding the 12–20-cm tail, and weighs 8–10 kg or more. This social species lives in groups within an extensive network of burrows called sets. Adult Eurasian badgers have few natural predators. In Europe tuberculosis and starvation are the most important causes of natural mortality, but thousands are killed annually by vehicles.

Ferret badgers (genus Melogale), also called tree badgers or pahmi, consist of four species: Chinese (M. moschata), Burmese (M. personata), Everett's (M. everetti), and Javan (M. orientalis). They live in grasslands and forests from northeast India to central China and Southeast Asia where they consume mostly insects, worms, small birds, rodents, and wild fruits. They are brownish to blackish gray, with white markings on the face, throat, and sometimes the back. Smaller than American and Eurasian badgers, they average 33–43 cm long, excluding the 12–23-cm tail.

The hog badger (Arctonyx collaris), also called the hog-nosed, or sand, badger, is a pale-clawed species of both lowland and mountainous regions in a range similar to that of ferret badgers. It is gray to black, with a black-and-white-striped head pattern and white throat, ears, and tail. It is 55–70 cm long, excluding the 12–20-cm tail, and weighs 7–14 kg. Hog badgers are nocturnal and find food by rooting. Their diet consists mostly of earthworms and other invertebrates, but they also consume fruits and small mammals.

Stink badgers consist of two species, the Malayan stink badger (Mydaus javanensis), also called the skunk badger or teledu, and the Palawan, or Calamanian, stink badger (M. marchei). The Malayan stink badger is an island dweller of Southeast Asia that usually lives in mountainous areas. It is brown to black with white on the head and sometimes with a stripe on the back. It is 38–51 cm long, excluding the short tail, and weighs 1–4 kg. The Palawan stink badger is a little-known badger from the Philippines on Palawan and neighbouring islands. Its scent is very strong and offensive. Both stink badgers have been reclassified from Mustelidae to the skunk family, Mephitidae. Like skunks, stink badgers have anal glands that produce a strong-smelling fluid that can be sprayed.

For the honey badger (Mellivora capensis), see ratel.