Eupithecia nonanticaria is a moth in the Geometridae family. It is found in New Mexico (the Pinos Altos Range and the Black Range), Arizona (the Chiricahua Mountains) and Chihuahua in Mexico. The habitat consists of mixed coniferous forests at altitudes above 1,760 meters. The length of the forewings is 9.5–11 mm for males and 9–11 mm for females. The forewings are pale greyish-white, with overlying darker scales. The basal and median areas of the hindwings are pale, but darker toward the margin. Adults are on wing from late July to mid August.