Felidae is a family of mammals in the order Carnivora, colloquially referred to as cats. A member of this family is also called a felid. The term "cat" refers both to felids in general and specifically to the domestic cat.

The earliest cats probably appeared about 35 to 28.5 million years ago. Fossil occurrences indicate that the Felidae arrived in North America earliest 25 million years ago. Results of mitochondrial analysis indicate that the living Felidae species descended from a common ancestor, which originated in Asia in the Late Miocene epoch.

Felidae species exhibit the most diverse fur pattern of all terrestrial carnivores. Cats have retractile claws, slender muscular bodies and strong flexible forelimbs. Their teeth and facial muscles allow for a powerful bite. They are all obligate carnivores, and most are solitary predators ambushing or stalking their prey.

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