Platygonus compressus, the flat-headed peccary, is an extinct mammal species from the Tayassuidae family that lived in North and South America during the Pleistocene.

[5][6] Platygonus compressus had elongated limbs, a short humerus, broad and erect thoracic vertebrae and a large scapula.

Genetic analysis conducted in 2017 indicates that the flat-headed peccary is a sister-taxon to a clade comprising extant peccary species, and divergence date estimates suggest that, if extant peccary diversification occurred in South America, then their common ancestor must have dispersed from North America to South America well before the establishment of the Isthmus of Panama, roughly three million years ago.

Platygonus compressus lived in a great variety of habitats and had a wide environmental climate tolerance.

This species was known to have roamed North American boreal forests and tropical rainforests in South America.