Inventories were made at 30 localities in Northern Western Ghats, between 15 N to 20 N latitudes, to compile checklists of butterfly species diversity. The checklist includes 191 species of butterflies belonging to 117 genera and six families. Nymphalidae was the most speciose family with 60 species followed by Lycaenidae (59), Hesperiidae (34), Pieridae (22), Papillionidae (15) and Riodinidae (1). The purpose of this paper is to bring the recent inventory data into a primary publication that would be available in public domain.