Orchids are an intricate component of forest ecosystems that contribute to a high proportion of plant diversity. The aim of this study was to investigate the diversity of orchids in the part of Western Ghats i.e. Sirsi. The present study revealed that 27 transects of 8 habitats of Sirsi recorded 29 species of orchids belonging to 22 genera in which most of them are epiphytes and two are terrestrial. Kondagallu region has the highest diversity and species richness. The highest Shannon’s diversity index was observed for Kondagallu and Sirsi, while Dyayagudu recorded the lowest Shannon’s diversity index. Kondagallu recorded the highest Simpson’s diversity index and the least was recorded by Dyayagudu. The highest species evenness was found in Hedge indicating thereby that all the species present in that habitat is more even where the least evenness was found in Sirsians indicating thereby that the number of different orchid species varied spatially.