吸口鲤科，又作胭脂鱼科或亚口鱼科，为辐鳍鱼纲鲤形目其中一科。

吸口鲤科下分4亚科14个属，如下：

The Catostomidae are the suckers of the order Cypriniformes, with about 78 species in this family of freshwater fishes. The Catostomidae are primarily native to North America, but Catostomus catostomus is found in both North America and Russia, and Myxocyprinus asiaticus is from China. They are not usually fished recreationally; they are not highly prized in North America for their flesh, although they are a fairly popular target with spear fisherman, and in some areas, such as the Ozarks, they are a common food fish.