西猯科（学名：Tayassuidae） 属于中小型偶蹄目动物，是生活在美洲大陆的猪形亚目的动物。西猯外形和习性和猪非常相似，但体型比猪科小，后肢只有3趾。虽为杂食性，但比猪科更适应植物性食物，胃的构造比猪科复杂，獠牙向下，而非野猪般向上弯曲，是强有力的攻击性武器，除了獠牙外，还有臭腺可用于驱敌。

包含以下几个属和种：

A peccary (also javelina or skunk pig) is a medium-sized hoofed mammal of the family Tayassuidae (New World pigs) in the suborder Suina along with the Old World pigs, Suidae. They are found throughout Central and South America and in the southwestern area of North America. Peccaries usually measure between 90 and 130 cm (3.0 and 4.3 ft) in length, and a full-grown adult usually weighs about 20 to 40 kg (44 to 88 lb).