兔，又称兔子，在汉语中是哺乳类兔形目兔科（学名：Leporidae）物种的总称。

在英语中，兔科下属所有的属，除了兔属（Lepus）以外，通常称为“rabbit”（中文常译为“兔子”）；而兔属大约占近一半的种类则常称为“hare”（常中译为“野兔”）。然而，在这两种俗名的区别并不应用于现在的科学分类，例如长耳大野兔是兔属的成员，而岩兔属（Pronolagus）和粗毛兔属（Caprolagus）有时称为“hare”。

Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. There are eight different genera in the family classified as rabbits, including the European rabbit (Oryctolagus cuniculus), cottontail rabbits (genus Sylvilagus; 13 species), and the Amami rabbit (Pentalagus furnessi, an endangered species on Amami Ōshima, Japan). There are many other species of rabbit, and these, along with pikas and hares, make up the order Lagomorpha. The male is called a buck and the female is a doe; a young rabbit is a kitten or kit.