Exochomus subrotundus is a species of lady beetle in the family Coccinellidae. It is found in North America, where it has been recorded from California, Arizona and Texas.
Adults reach a length of about 2.70-3.40 mm. Adults have a black head and pronotum, sometimes with a yellow anterolateral angle. The elytron is dark brown or black with a yellow or orange lateral border and basal spot.