Mylothris kilimensis is a butterfly in the Pieridae family. It is found in Kenya and Tanzania. The habitat consists of submontane and montane forests.The length of the forewings is 22–27 mm for males and 22.5-27.8 mm for females. There is a large pale yellow basal area on the upperside of the forewings in both sexes. The hindwings with have a pale yellow basal area. The underside often has rays of greenish-yellow suffusion, particularly in females.