The diversity of butterflies of Doresanipalya forest was studied from April 2018 to November 2018 by line-transect method. During pre-monsoon, monsoon and post-monsoon a total of 68 species under 47 genera of six families; viz., Papilionoidea, Pieridae, Nymphalidae, Riodinidae, Lycaenidae and Hesperiidea were recorded. Of these family Nymphalidae accounted for 35% (24 species) of the total species count followed by Lycaenidae (17 species), Hesperiidae (10 species), Papilionoidea (8 species), Pieridae (8 species) and Riodinidae (1 species). Species richness was highest in the post-monsoon, with a total of 60 species. The diversity indices such as Shannon-Weiner diversity index, Shannon Evenness index and Simpsons diversity index were calculated.