Borhyaenidae is an extinct metatherian family of low-slung, heavily built predatory mammals in the order Sparassodonta.

Borhyaenids are not true marsupials, but members of a sister taxon, Sparassodonta.

Borhyaenids had strong and powerful jaws, like those of the unrelated placentalians Hyaenodon and Andrewsarchus, for crushing bones.

However, in recent years, with the elevation of most sparassodont subfamilies to family rank and the discovery that borhyaenids are more closely related to proborhyaenids and thylacosmilids than other sparassodonts, the family has been reduced to seven species in four genera.

[1] The most studied borhyaenids are the Early Miocene taxa, particularly from fossil sites in the southernmost part of Patagonia.